<i>Senpai x Kouhai Sex</i> * Part 1: A pair of salesmen colleagues end up having sex when the assistant approaches his boss for advice on something he's been troubled by. * Part 2: The pair of salesmen colleagues have become friends with benefits and have sex for a second time. * Part 3: The pair of salesmen colleagues who are in a "friends with benefits" relationship become EVEN MORE intimate when they go on a business trip together. * Part 4: The pair of salesmen colleagues stay at one another's place for the first time after having become lovers. * Part 5: What did the two get up to at night after attending the party of a client? Mishima saw his beloved senpai talking with a woman at the party and is filled with envy... <br><br> Characters: * [Ichijou-senpai (30 years old)]: Sales Department Head. A cheerful guy. His motto is to live joyfully. * [Mishima-kun (25 years old)]: Sales Department Assistant. Is usually rather quiet. Very diligent about work.