Ookii Onnanoko wa Suki desu ka?

大きい女の子は好きですか？

Souta was suddenly made dorm manager and coach of the Hokuei University Women's Volleyball Club as prompted by his older sister, Kaori. There, he had a fateful reunion with Ayano, his first love... In the girls' dorm! In the gym! In a hotel?! What awaited him were days of being bossed around by girls bigger than him! A Happy Harem Rom-Com of Size Differences♡ Born Huge on the Northern Plains!!

(Source: OceanVeil)