Please help me find the title of this certain manga where the first scene is a guy trying to catch someone falling from the stairs. Then in the hospital, the guy who fell can't remember him and told him that he just happen to passed by. The guy with amnesia is a patissier because he said that he has many sisters that is why he came to the conclusion of making sweets. It turns out that the first scene is about him not agreeing to break up.
Another one is that at a cafe there is a guy observing a man, he looks at him playfully reminiscing about his ex. Then this guy went to his house and found couple things like the cup. In the end, it was his real boyfriend he was talking about earlier and that it was just a play.