I've read this manga three times at least. It was one of the first BL manga I ever read. It's unbelievably realistic to the point I almost feel bad for seme until you realize basically he's crazy and has been in love with is sempai for years. The follow up to this carp/chopping block is also amazing. Really its just a regular guy falling in love and struggling with his identity as he does so. Its poignant and sweet and painful.
Kyuuso Ha Cheese no Yume Omiru