Yup. I dont remember the title for a manga again. Sorry! Its just as the title says, the uke jumps off the building and lands on a bush. He said he doesnt know who he is so the seme says hes his boryfriend. So the uke goes over to the semes house as the boyfriend. In the end he tells the truth the uke never loses his memories and such. He always loved the seme so when the seme cofessed on the rooftop that day he was really happy until the seme told the uke to forget about his confession. Its a oneshot by the way. Please help! Thank you very much!

It's Koi Mane chapter 5 =3

Ah yea! Thank you!!!!