Unrequited Love with a Replacement

This one specifically has high school students. The two MC disturb a hetero couple on the edge of school property. The seme looks to be trying to start a fight, but the uke tells him to leave it. When asked why, he admits that it was the person he likes there. Both the girl, who overhears, and the seme originally think it's the girl, though later conversation has the uke coming out to his friend and admitting it was the male, Tada (whose name is the only one I remember), whom he likes. Upon hearing this, the seme offers to be a replacement, and seems really confused about his reasons for doing so.

After, the seme realizes that he really liked his friend calling his name as he comes, and realizes he likes his friend. Meanwhile, the girl realized that the uke would be a better boyfriend than her current delinquent, and makes a move. The uke kisses her, then tells her she disgusts him, pushing her away.

Tada oversaw his girlfriend's actions, but misinterprets them as the uke putting the moves on his girl, so he and his buddies gang up on him. The uke, during the altercation, gets hard? Either way, he's overpowered, and Tada tells him that he may as well suck Tada's cock. It fades out from this scene.

Then we see the seme, who can't find his best friend. He ends up rhapsodising over his buddy's bike seat, since it's been touching his ass. He's interrupted by the hetero couple, as the girl says, "That's so mean!" He charms his buddy's location out of her, threatens Tada, and runs off. His buddy wasn't raped, they didn't go that far, but they tossed out his pants and underwear so he can't leave the bathroom he's in. The seme shows up with his gym clothes, or some other spare pants, and tosses them over the cubicle to his friend. They had fought earlier, so he's prepared to just leave now that his friend can go, too. but his friend rushes out to hug him. Then he admits that he's really always liked the seme, but didn't want to ruin their friendship, so he unconsciously pushed his feelings onto Tada instead. They get together after that, and I think have sex in the bathroom, despite the uke's protests. Lastly there's a scene with the bike again, and the uke admitting he didn't want to have sex because he can't sit on his bike right now and needs to pedal standing up.