Mahiro Oyama

The protagonist of this work. Originally male, he was turned into a middle school-aged girl after his sister Mihari made him take a drug. He's a NEET with a hobby of playing eroges, partly due to his inferiority complex towards his overachieving sister. Although he was initially unhappy about being turned into a girl, getting closer to Mihari and meeting the Hozuki sisters has made him somewhat appreciate his current life. Eventually, he transferred to a middle school, becoming a real middle school girl (JC). After becoming a girl, he's not entirely uninterested in his new body, but Mihari warned him that "a male brain can't handle female pleasures without going haywire," which makes him cautious about sexual things. When acquaintances or friends accidentally see him naked due to mishaps, they describe him as "smooth...". His birthday is March 6th.