Tomodachi to Jikken Shite Miru Hon. Kouhen | A book about experimenting with your friend, part 2

Tomodachi to Jikken Shite Miru Hon. Kouhen | A book about experimenting with your friend, part 2 cover

[毛糸の森 (うーる)] 友だちと実験してみる本。 後編 [英訳] [DL版]