Ore no Joushi (Toshishita!) ni Oshiri wo Nerawareteimasu!

This is a spicy office romance between a young boss and his subordinate! Rui, grandson of the CEO, is handsome and successful. He has been in love with Tatsu, his childhood friend and now subordinate, since they were kids, but his feelings were never reciprocated. Rui covers up for Tatsu's mistakes at work in return for sexual favors, making Tatsu please him with his mouth and fondling each other in the office at night after every one else has gone home. Tatsu doesn't know much about sex between two men, but when Rui goes a step further one night, he begins to discover another side of himself.