Help meee find that bl

It’s a one shot I think (like an independant story from a full manga I think?). It starts with the couple chilling in their room and one of them (The seme I think) suddenly said he wants to break up. The other (Uke) is like "Ok-wait what?!" And then the seme leave the house with his belonging, leaving the uke alone in the house. I think seme was testing him or something like that. Uke became depressed and the house was in a mess. He tried to do it with a girl but it didn’t work. When seme finally come back, uke was masturbating. Then uke took a knife, menacing seme. Then they had sex, uke was riding him but he didn’t manage to put seme dick in him and he was crying.