This image is unavailable on Donmai. Go to Danbooru or disable safe mode to view (learn more).
Artist's commentary
Hibiki Sensei [Gut Punch]
Hibiki explaining (and not explaining) stuff.
Teach me, Hibiki Sensei 1-5 is now selling on consignment at Melonbooks.
https://www.melonbooks.co.jp/detail/detail.php?product_id=569689