Hm, interesting so far. Guy has a huge crush on his high school friend, to the point of having an almost constant blush (so cute) but one day his friend gets too close and he reflexively pushes him, causing his leg to get hurt and him to not become a judo pro. Crushed by guilt, when the judo friend comes back into his life asking for a place to crash for a little while, the main character can't say no. It's obvious, though, that the judo friend is up to something.
Mujintou Ni Motte Iku Nara