Gyaru ni Yasashii Otaku wa Inai

Sakuya, the extroverted boy Iwanaga grew up with as childhood friends, all the way through high school, shows up one day, now turned to a girl. Having become the "gal who's kind to otaku," the two end up on a date that doubles as a shopping trip. But the real reason behind Sakuya becoming a girl lies in a certain single line Iwanaga said back in high school...? This is that kind of TS romantic comedy.