Osananajimi no Mune ga Ookiku Natta no wa Ore no Sei Kamo Shirenai
幼馴染の胸が大きくなったのは俺のせいかもしれない
Yamato is in his second year of high school when his childhood friend, Honoka, develops a condition that causes her chest to grow significantly due to stress. He now faces the challenge of keeping her safe from people who stare at her with inappropriate intentions.
