TordTom highschool au where Tord has a girlfriend that Tom really hates but he doesn't know exactly why. She's cute, she's smart and she's a good person. Overall, she's a great match for Tord. Tom should be happy that his best friend found someone like her, someone who would treat him so good, but he isn't.
He keeps his dislike hidden, for the sake of not ruining his friendship with Tord, but also not to ruin their relationship. As much as Tom dislikes her, Tord loves her. He's happy with her, because of her. And Tom? Well, he doesn't want to be the reason that Tord no longer smiles.
They kinda drift apart. Not fully, they're still best friends, but Tom notices how Tord is spending more time with her than with him. Even when they are hanging out together, she often tags along, uninvited. It's never just the two of them anymore.
Tom hates it. He hates her. He hates their relationship. He hates how she stole Tord away from him.
He just wants his best friend back.
But Tom continues to say nothing because even though he hates their stupid relationship, he's a good supportive friend. (In fact, he's already decided that he's gonna be Tord's best man during their wedding, despite the fact that just the idea of them marrying makes his heart painfully twist).
Tord ends up finding out though. It takes a few months, sure, and it only happens because Tom's a blabbermouth when he's drunk. It's during when they're hanging out together, just the two of them for once. Tom gets drunk and ends up confessing everything. He groans about her, about how she's stealing Tord away from him, about how she replaced him. And suddenly, his face gets hot and he's crying and Tom doesn't understand why he's crying, he just is.
Tord just listens. He looks surprised but he doesn't say anything. He tries to, but Tom keeps on rambling and rambling and he just can't interject, until he finally has enough. He grabs Tom by the shoulder, but Tord does it a bit too rough because Tom thinks he's going to hurt him, so he attacks him first. Suddenly they're fighting, until Tord manages to pin Tom down. They're both out of breathe, tired and upset (for very different reason), but Tom keeps struggling and struggling, trying to get out of Tord's hold. Finally Tord has enough and kisses him rather roughly. It takes Tom by surprise, but it doesn't take long for him to kiss back and oh-...
That's why he disliked her and their relationship so much, why he felt so jealous of her.
Tom likes Tord!!!
But wait, what about Tord's girlfriend? Isn't this cheating? Well, not that Tom actually cares about homewrecking. He's too drunk and desperate to care. Right now, all he can think about is getting Tord closer and closer because he's just not close enough.
He can deal with the wreckage when he's sober.
(Eventually, Tom will learn that Tord's relationship with his girlfriend was never that great or healthy, and the only reason Tord stuck with her was because he didn't want her to hurt him, herself or others).