Title??

Guys, I need some help here. I remember reading this yaoi but only several chapters, where the uke is a worker and the seme works in a bookstore (or a library?). In the past, the seme confessed to the uke during their graduation day but the uke rejected him by saying it's disgusting. Then, currently, the uke will sleep with anyone bcoz he feels that he was too cruel to the seme during the confession. If I'm not mistaken, it has a tragedy genre. Please kindly tell me the title if anyone knows it (▰˘◡˘▰)