Biography

his parents — Kazuo and Shinobu Kasamatsu, Yukio Kasamatsu (older brother), Fumio Kasamatsu (younger brother), Takeo, Ayumu, and Mihiro Kasamatsu (cousins), Kentarō Midorima (father-in-law ), Mayuko Midorima (mother-in-law), Shintarō Midorima (brother-in-law), Mika Midorima (wife).

​

He has a slightly strained relationship with his father because although he loves his father and appreciates that his father works hard so the Kasamatsu family can live a comfortable life, he isn’t around much but his father still cares about his family, even making calls when he can to check in on his wife and children and has many qualities that his older brother takes from such as their manliness, seriousness, and discipline methods as when his father was around and he and his brothers were being a handful, he’d use force as a means to discipline them. His mother calls him, and his brothers shortened versions of their names and “chan”. Yukio is “Yu-chan”, Hideo is “Hii-chan”, and Fumio is “Fu-chan.” While his older brother takes after their father a lot, he took after his mother in sharing her patience, being even-tempered until someone disrespects their loved ones, caring for others, as well as her smile. His mother is very loving towards all her sons and worries about them. Both he and Yukio inherited their father’s aptitude for sports, strong will, and confidence. All three Kasamatsu siblings have a strong resemblance to their father. Yukio and Hideo eventually outed themselves to their parents, but their parents reassured them that they had made the resolve to love their children despite their sexual orientation.

​

Yukio is his older brother by 3 years. Their parents encouraged them both to play Mini-Basketball when they were 5 years old, and both grew to love it. When he was younger, he called Yukio “Yukio nii”. Fumio is his younger brother by two years. When Yukio was 10 years old, he was entrusted to take care of his siblings so their mother could contribute to the family income which made both of his siblings get attached to him like puppies. Yukio asked Hideo to help him take care of Fumio and Hideo was happy to be entrusted with the responsibility. Fumio calls Hideo “Hideo nii”. Yukio finds that both of his younger brothers are noisy and makes their lunches when he got older to help around the home and his mother. Yukio often tells Hideo and Fumio to shut up or gets annoyed by Hideo’s drum playing and tells him to stop. Hideo worships his brother because his brother is cool as a nationally renowned point guard, and he loves his older brother so much because he was a huge presence in his upbringing. As he got older, he started calling Yukio “Yukio nii-san”. He loves and appreciates him even when he gets hit by him. Yukio uses force as a method of discipline on his brothers. Yukio taught Hideo how to cook and told him to prepare himself to be the man of the house when he goes off to university. Yukio and Hideo eventually both found out that they were both bisexuals over FaceTime which made them relieved that someone in their family knew about their sexual orientation and accepted them regardless. Hideo loves to play fight with his brothers, but he will lose to Yukio every time. He still blows raspberries into Fumio’s belly button when he’s rolling around and being physically affectionate with him. He is protective of both his brothers and will lose his cool when someone disrespects either one of them. He acts as the mediator between his brothers so that Yukio doesn’t beat Fumio up and gets scolded by their mother and scolds Fumio to be respectful and apologize to Yukio. Although both Hideo and Fumio respect Yukio a lot, they tease him for plucking the ends of his eyebrows which Hideo doesn’t think is manly nor does he understand the trend and Hideo often admonishes Yukio that he cannot be afraid of girls forever which leads to him getting hit by Yukio. When Fumio learned that both his brothers were bisexual, he said “Wow, I guess I’m the only straight man here. I still love y’all. No homo or incest of course.”

​

Her male cousins were like brothers to her although she saw Yukio like an older brother since he was born before her while she saw Hideo and Fumio like little brothers. She loved Hideo’s cheerfulness. Hideo calls her “Mihiro nee-san”. After awakening as a Sailor Guardian, when her cousins started texting her due to her mother’s request, she was frustrated by her mother’s love and guiltily decided to text her cousins back hours later and apologize saying that she was busy, so she was relieved when they gradually texted her less before stopping altogether. Yukio told his brothers not to text her anymore since she was busy and while Hideo was upset about it, Yukio said that life kept people busy. She wanted to distance herself from them because she was afraid that if they got too involved with her, they could get hurt because she was a Sailor Guardian. She still did her best to follow up on what was going on with her cousins from her mother’s conversations with her aunt. She watched over her cousins from a distance in the form of Sailor Charon before watching over them from afar in civilian form. She also owns a Basketball Monthly magazine that has an article that covers Hideo.  She did her best to watch Yukio’s and Hideo’s games when possible. She cried as she told him she missed him and his brothers a lot, but she was always watching them from afar. Yukio teared up as he told her he believed her as they hugged. Hideo caught wind of the fact that Mihiro was in Yukio’s room, so he knocked on the door and exclaimed “Mihiro nee! I know you’re in there!” Yukio yelled “Just open the door and get your ass in here idiot!” Hideo joined the group hug while crying and Fumio was at the door and Mihiro told him to join the group hug otherwise she’ll kick his ass and Fumio hugged her while crying. Mihiro decided that their families should have a camping trip before she and Yukio went off to university and asked Hideo if he knew any girls, he wanted to invite otherwise it would be just her and Kairi Mizuno, so he invited his girlfriend. Yukio and Mihiro both got into K.O. University. Yukio and Hideo were happy to find out Mihiro was also bi, and Fumio accepted it as well. Yukio and Hideo later learned that she was Sailor Charon. When Hideo learned about his brother’s break up with Ryōta, he decided to talk to Mihiro about the news on the phone to process his feelings. Afterwards, he felt certain that his brother and Ryōta would get together again and Mihiro shared his belief.

​

Her male cousins were like brothers to her although she has some of her own. She saw Yukio like an older brother since he was born before her while she saw Hideo and Fumio like little brothers. She loved Hideo’s cheerfulness. Hideo calls her “Mihiro nee-san”. After awakening as a Sailor Guardian, when her cousins started texting her due to her mother’s request, she was frustrated by her mother’s love and guiltily decided to text her cousins back hours later and apologize saying that she was busy, so she was relieved when they gradually texted her less before stopping altogether. Yukio told his brothers not to text her anymore since she was busy and while Hideo was upset about it, Yukio said that life kept people busy. She wanted to distance herself from them because she was afraid that if they got too involved with her, they could get hurt because she was a Sailor Guardian. She still did her best to follow up on what was going on with her cousins from her mother’s conversations with her aunt. She watched over her cousins from a distance in the form of Sailor Charon before watching over them from afar in civilian form. She also owns a Basketball Monthly magazine that has an article that covers Hideo.  She did her best to watch Yukio’s and Hideo’s games when possible. She cried as she told him she missed him and his brothers a lot, but she was always watching them from afar. Yukio teared up as he told her he believed her as they hugged. Hideo caught wind of the fact that Mihiro was in Yukio’s room, so he knocked on the door and exclaimed “Mihiro nee! I know you’re in there!” Yukio yelled “Just open the door and get your ass in here idiot!” Hideo joined the group hug while crying and Fumio was at the door and Mihiro told him to join the group hug otherwise she’ll kick his ass and Fumio hugged her while crying. Mihiro decided that their families should have a camping trip before she and Yukio went off to university and asked Hideo if he knew any girls, he wanted to invite otherwise it would be just her and Kairi Mizuno, so he invited his girlfriend. Yukio and Mihiro both got into K.O. University. Yukio and Hideo were happy to find out Mihiro was also bi, and Fumio accepted it as well. Yukio and Hideo later learned that she was Sailor Charon. When Hideo learned about his brother’s break up with Ryōta, he decided to talk to Mihiro about the news on the phone to process his feelings. Afterwards, he felt certain that his brother and Ryōta would get together again and Mihiro shared his belief.

​

When Hideo met Mika’s family to ask permission to date over a meal, he could see that Mika took a lot after her father. He was also admittedly afraid of meeting Mika’s father because Youta told him that the greatest obstacle to dating a girl was her father. That was why he tried to be very polite to Kentarō which made the man burst out laughing from seeing the boy trying hard to make a good impression on him. He could see that Mika’s mother had glasses and so he deduced that she got her studiousness from her mother. Kentarō and Mayuko Midorima were impressed that Hideo was the captain of the Kanagawa Junior High’s boys’ basketball team. Mayuko wasn’t completely impressed that Hideo was a B student at best. Both Mika and Hideo tried to appeal to Kentarō and Mayuko that they wouldn’t be able to see each other every day which meant that their relationship wouldn’t be a distraction to their studies which made the two adults give a firm “Good”. It made Mika and Hideo sweat at the adults’ reaction, but Mika’s parents smiled and gave their approval as it was clear Mika and Hideo cared for each other a lot which made the teenagers relax. However, as Mika’s older brother was picky about potential suitors, Mika decided to keep her relationship secret from Shintarō from her brother. However, one day, Shintarō caught Mika kissing Hideo in front of their house, and he was filled with irrational anger. He demanded to know who the boy was, and Mika explained that Hideo was her boyfriend which made Shintarō angrier stating that this period in her life was crucial, and she didn’t need a distraction with a boyfriend. She argued that they couldn’t see each other every day anyways. Shintarō assumed that Mika’s boyfriend was responsible for making him lie to her and was about to lift Hideo to shoot him like a basketball until Mika told her brother to do it to her instead which he was fine with, and he shot her into the air (which honestly wasn’t anything new to Mika which was why she said “Whee!”) Hideo called Shintarō a monster and kicked him hard in the butt before running after Mika in the direction that she flew. Shintarō also ran after Mika after recovering from the pain and they found that Mika landed in the rear of a parked truck that had mattresses. Shintarō was all nonchalant saying that Mika had a lot of good luck. However, after Hideo explained that they had already asked permission from their parents to date, Shintarō was very sheepish and got scolded by his father after Hideo told him what happened. Later, Shintarō sees that Hideo cares about his sister a lot and has a compatible personality to Mika and eventually entrusts Hideo to keep her safe and take care of her. Hideo eventually does respect Shintarō as a shooter and comes to see that he does care for Mika but keeps his distance as he has a lot of bad luck. He calls Shintarō “Shintarō-san” then called him “Shintarō nii-san” after marrying Mika.

​

​

​

​