A little idea I got, it's gonna be a little long

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On the first day of school, Kay and Koy got there a little early. So did another kid. They got to class 1-A and saw the other early student. "Oh, hi there!" Kay said to the student, he looked over and bowed to the twins. "Hello classmates, I'm Tenya Iida," he introduces himself, Kay's eyes light up a bit. "Wait...don't you have an older brother?" she asked. "Why yes, I assume you've heard of him?" Iida said. "He's my favorite pro hero! He's so cool! And he's such a great idol!" Kay said with a smile. "And somehow you're a Bakugou fan..." Koy said. "I'm Koy, and this is my sister Kay, our last names are Minti, but because both of us are in this class, better to call us by our first names," he told Iida with a smile. "It's nice to meet you both," Iida said with a smile, Kay smiled and bowed. "I just want to say that being your classmate is an honor, your brother is the best hero, and you'll be just as great of a hero as your brother!" she says happily, Iida blushes, pushing his glasses up. "Thank you, that's very kind of you."

A few days later

Iida and Kay had become closer as friends, Kay did always hang out with Bakugou, but she also followed Iida around a bit. One day, Bakugou had his feet up. "How dare you disrespect the desk! Our ancestors sat in these desks!" Iida said. "You're joking, right?" Bakugou asked with a grin, Kay went up to him. "Please put your feet down...Iida's older brother could've have sat there..." she said, Bakugou saw how cute she looked, he then looked away growling and put his feet down. "There..." he said, Iida bowed to Kay. "Thank you, but...you didn't need to use my brother as an example, there's a lot of heroes that went here," he said. "I know, but as I told you, your brother is the coolest hero, I thought it is right to use him! I know he wouldn't disrespect the desk!" Kay said happily. "I thought I was your favorite!" BAkugou yelled at her. "Y-you are my favorite pre-pro-hero, his brother is just my favorite pro...when you become a pro, you'll be my second favorite," Kay said gently. "WHY THE HELL DID I GET DEMOTED TO THE SECOND FAVORITE?!" Bakugou yelled. "She was always a fan of Ingenium, you were always second," Koy said, Bakugou and Koy then began to argue, Kay tried to stop them. "Guuuys..."

End of the day

At the end of the day, Kay was talking to Deku about something and about to go home with her brother when Iida went up to her. "Kay, do you want to meet my brother?" he asked, Kay's eyes lit up. "More than anything!! Though he always seems busy, I wouldn't want to bother him," she explained, Iida smiled gently. "He's visiting today, if you'd like, you can come and see him, he loves seeing fans," he explained to her, Kay had a very big smile on her face. "YES YES YES!!! I WOULD LOVE TO!! LET'S GO LET'S GO LET'S GO!!" she yelled, hopping up and down, Koy smiled, heading home. "I'll see ya later, take care of her," he. "Don't you want to see him too?" Iida asked Koy, shrugged. "Maybe another day, your brother is cool, just don't wanna overwhelm him," he explained, leaving. "I'm ready! I'm ready! I'm ready!" Kay said Iida led her to his home.

When they get there, Iida opens the door. "I'm home, Tensei, I brought a friend who wants to see you," Iida said, Kay looks and sees Ingenium (aka Tensei) there. "You got a girlfriend?" he asked his younger brother, which made him blush. "N-no! She's just my classmate, she's a fan, I told her that she could see you..." Tenya said. (I'mma use his first name so it's not confusing) Kay waves a bit, giggling shyly. "H-hi...I'm Kay Minti, you're super cool, I've always wanted to meet you, your brother is really cool like you, can you shirt my sign, I-I mean sign my shirt?" she asked, being nervous, Tensei chuckles, getting a pen, about to sign her jacket. "Wait! This is her school shirt!" Tenya said, Tensei smiles. "I don't think the school will care if a hero signs it," he said, signing the jacket anyway. "EEEEE!!!" Kay fangirls. 

They hung out for the rest of the day, and Kay became a bigger fan, seeing how much fun it was to hang out with Tensei, seeing how much he cared about his younger brother. When the sun was setting, Kay headed home. "Thank you for signing my shirt, Ingenium, and thank you Tenya for letting me hang out with your brother," Kay said happily, she then realized she said his first name. "Iida, I meant Iida," she corrected herself. "I don't mind if you call me Tenya, it's alright," he tells her with a smile. "Okay, I'll see you tomorrow, bye!" Kay said, heading home.

Skip to the festival

Kay had fought won her first few matches, but then lost to Bakugou, it was really close though. Her brother and friends checked on her. "Are you okay?" Tsu asked, Kay, smiled, having a cast on. "Yeah, I'm okay, Bakugou's really strong, I mean, I knew this, but, he gave me a good fight, I gave it my all, but he's just better, but I'll do what I can to get stronger!" she said, she then looked at Iida. "When I was fighting, I was trying to do a move your brother did, I don't know if you noticed or not...I hope he watched and noticed..." she admitted. Iida smiled. "I did, he would be proud of you, Kay," he said, his phone then rang. "One moment please," he said, leaving the room. "Hello, mother?" he said Kay watches him leave. "I hope everything's okay."

After she was out of Recovery Girl's office, Iida went over to her, Deku, and Uraraka. "My brother Ingenium was taken down by a villain called Stain," he informed them, all of them looked shocked. "D-do you know if he's okay, Tenya?" Kay asked. "I don't know, I'm going to leave early to see how he's doing..." he said, he was about to turn away when Kay hugged him. "Give Tensei a hug for me...tell him I'm worried, and not just as a fan, but as a friend as well..." she tells him, holding back her tears, Iida hugs her back. 

After a few days

Iida returns from the hospital, he told Deku that his brother was doing good. They went to class, and Iida saw Kay pacing back and forth by her desk. "Calm down, he's probably doing good," Koy said, Kay then saw Iida. "Tenya!" she said, going over to him. "Is he okay? Is he going to make it?" she asked, Iida took her by the hand, going to the staff room. As class rep. he got access. (Just for the sake of the story) "Kay, I...I don't know how long he's got...I'm worried...I'm scared...he's the toughest person I know, but seeing him like this..." he looks down, Kay then hugged him, tears going down her face. "I'm so sorry, Tenya, if I or Deku, or anyone can help, let us know...we're here for you..." she said, Iida hugs her close.

They get back to class and choose their names. Tenya ad his name as his hero name. Kay thought for a while then chose a name. She went up and showed the class. "I want my name to be something that people will remember, so, in memory of Ingenium, I want my hero name to be Earth Ingeniumine," she then looked at Iida. "I will do my best to be as great as your brother, I'll live up to his, and your expectations," she said, Iida smiled sadly, Kay shared the smile. "It's so sweet! I love it!" Midnight cried out. 

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It was an idea, I hope you guys like it.