Disclaimer first, this is a practice (練習) drawing to study and learn how よむ先生 draws his characters~ I don't own the pose or anything and everything is for learning purposes. (学習目的でのみ使用, sorry for my bad japanese)

Main credits: よむ先生, https://www.pixiv.net/en/users/6210796

If the owner wishes this to be taken down, please DM me.