So it was a omegaverse manga. Top and bottom were friends at first, they both were alpha at the starting of the story. But later he got converted in to omega. During the conversion period when he was unaware of this, bottom was unable to have an erection and only exception was top's pheromones. Once they even tried 4SUM, where top and bottom where completely engulf in each other leaving the two girls out. Like the girls were just for Intercourse, Seme and Uke were kissing and all. One girl said that "you two are disgusting being alphas and kissing eachother"
Can you help me find it

It was a high school bl manhwa, I don't remember the exact plot but I remember a scene, while going on a school trip Uke (black hair) purposely chose another group full of nerds instead if Seme's. He was quite upset, at the time of school trip, he sneaked in to uke's room after curfew and took uke with him to his room. His friends sneaked out so they were alone