Hajimete no Shitsuren
Uniform fetish. Two guys who used to hook up meet again in a library.
Hachimitsu Darling
"Takahashi Chihiro has always been an useless kind of guy, drifting through school and life with no permanent attachments and no real goals. He's not even sure why he picks up the kitten on the side of the road. But when little Shiro gets sick, Chihiro is desperate and turns to veterinarian Kumazawa."
Secrecy
"High-school senior Hawegawa Saturo likes the looks of a man he sees in the train station and follows him, which leads to a one-night stand. Although there is no promise of a relationship, he grabs 23-year old Kubata Hiroki's business card, as a sort of good-luck charm that they'll meet again. But Hiroki is suffering from unrequited love for his senpai, who is getting married soon. Can Saturo make Hiroki see him, love him, instead of using him as a stand-in for another man?" The art is drawn so both characters look extremely young, but I eventually got past that.
Ore wa Senpai no Nan Nan Desu ka?!