Shoudoubutsu OL to Moujuu Size Joushi ha Hatsujouchuu -Kikakugai Sugite Sakippo dake de Onaka Ippai desu...!-

Summary

Mizuki is a small woman with a baby face whom everybody treats like a pet hamster. She's in a relationship with Akira, her very tall and tough-looking boss, who is secretly into all things cute. One day they finally decide to make love, but Akira's manhood is just as oversized as the rest of him, and way bigger than she ever could have imagined. On top of that, he's almost a foot and a half taller than her! Their size difference allows them to have a uniquely sweet and exciting love life that will enthrall them both...!