Having been feminized by a suspicious drug given by his little sister, what fate will Oniichan face...!? (The manga parts of RJ247862, RJ273796, and RJ296502, bundled together!)
"BUATSUISOU," the sharehouse that 159cm tall high school student Kotatsu moved to turned out to be a BIG house where everything is BIG! Including the inhabitants which are all over 2 meters tall!