My ex-girlfriend came to buy large-size condoms, only to find out her boyfriend was my friend, which caused her to have an erection and a throbbing stomach. (Tsukino Luna MIAA-614)

My older girlfriend, Luna, whom I liked, broke up with me after telling me she had someone she liked. The person she liked was my friend, Guitai. She even went to the convenience store where I work and bought large-sized condoms…