Otodokemono Desu!
(1) A cutesy courtship between a bashful company president and a sunny delivery man. (2) The angel of destiny screws up tying a red thread on the pinky of a lonely 30-year-old virgin so that they can have sex together. (3) A competitive entry-level salesman uses the thought of sexual power over his sempai to aim for first place in the company. This one's quite sexy. (4 and 5) Schoolboy idiot couples. (6) A salaryman, constantly harassed by his Shachou at work, a man who was his sempai at school, decides to turn the tables and accept his offer. (7) The same couple decide to actually do the deed, but end up having hallway sex in front of a mirror. Most of the stories are fairly stock, although the third one seems more memorable to me. I wish there had been a continuation of that one instead.
Aibou No Jouken