I'll leave it to your imagination (Pixiv Fanbox)

教師として・・こんな展開は初めてだった・・。同窓会に呼ばれた後の意外な展開に・・私は驚きを隠せない・・。でも、この子は生徒の時から大人になった今まで・・、何ら変わっていない「お調子者」だった・・。 As a teacher, this was the first time I had ever seen something like this happen. I couldn't hide my surprise at the unexpected turn of events after being invited to the reunion. However, this child has remained the same "playful person" ever since he was a student until now, when he has become an adult.