18+ 152 cm 62 Kilo no Koibito

Mina, a chubby office worker, has never been treated like a woman thanks to her figure. The first person to treat her like a woman is Tachibana, the company's #1 most popular section manager! Although Mina is secretly in love with Tachibana, she lacks self confidence and gave up from the start. However, Tachibana strongly comes on to her and they sleep together! And then begin the days of being doted on by Tachibana...!?

(Source: AlphaPolis, translated)