But what if Tenya was Katsuki's love rival? Like, Shoto is too busy with family business and making friends, Ochako is in love with the blonde vampire girl
Tenya is right there, growing with Izuku, being his friend, learning stuff, holding his hand in hard moments, stopping each other from doing stupid shit, encouraging each other to do stupid stuff too, and they both are so passionate about what they want
Izuku and Tenya fall very naturally into something romantic, soft, born of mutual respect and friendship
And now Katsuki is in the picture, he is also slowly growing with Izuku, they are rivals, they are now friends, Katsuki wants to get to know Izuku, they passed so many years ignoring each other that he wants to know more, apart from hero stuff and food Katsuki wants to know what he watches, what he does, how he chose his clothes, what he likes in a guy, you know, he is interested in him
And then there's Tenya, who casually holds Izuku's hand, who sits with him at lunch, who hugs him when he starts to feel bad after everything that happened, who is always there, and Katsuki respects Tenya, he thinks he is a great dude (he won't tell him, but he knows how good of a hero he is and how everyone thinks he is a good person and leader even when everyone likes to annoy him) and Katsuki feels out of place but he won't give up
And then Tenya place his arm around Izuku's waist and looks at him, he slowly sinks his nose in Izuku's head and Izuku laughs and they both look so happy, and Katsuki knows it's fighting time, Tenya pretends he doesn't know about this and just keeps placing Izuku's legs on his lap