Bokutachi wa Benkyou ga Dekinai - According to some fans and in wiki. December 28 is the Birthday of Mafuyu-sensei. So, anyone here in Manga readers can confirm it, and please screenshot

June 2019 – RABUJOI – An Anime Blog

Bokutachi wa Benkyou ga Dekinai celebra el cumpleaños de Mafuyu

Study Group = Harem. BokuBen Review

Mafuyu KIRISU (Character) –

Bokutachi wa Benkyou ga Dekinai [Archive] - AnimeSuki Forum

Bokutachi wa Benkyou ga Dekinai! Episode 2 Discussion (20

Mafuyu-sensei is the one who touches the MC during the fireworks

Study Group = Harem. BokuBen Review

Bokutachi wa Benkyou ga Dekinai! Episode 12 Discussion - Forums

Kirisu Mafuyu is afraid of bugs Bokutachi wa Benkyou ga Dekinai