Onimai: I'm Now Your Sister! #7

Plot

One day, former shut-in Mahiro Oyama woke up as a girl-and his life has only gotten weirder from there! With his second chance at eighth grade summer vacation, not to mention the school festival, field day, and more, he's living his new life to its fullest! Mahiro slowly comes out of his shell, becoming closer to his new friends and even the popular girls in class…plus, he discovers another side to his homeroom teacher that nobody expected! The new life of this brother-turned-beauty is becoming more fun with every passing day!