Nagatoro got the idea for the nipple guessing game from Love Slave

flustered – RABUJOI – An Anime Blog

Don't Toy with Me, Miss Nagatoro / Characters - TV Tropes

Don't Toy with Me, Miss Nagatoro / Characters - TV Tropes

Chapter 12, Nagatoro Wiki

uesaka sumire – RABUJOI – An Anime Blog

WIW] Don't Toy With Me, Miss Nagatoro! Where the hero just can't seem to get it together., Other Media

Ijiranaide, Nagatoro-san - Episode 3 discussion : r/anime

» Kono Subarashii Sekai ni Shukufuku wo!

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Don't Toy With Me, Miss Nagatoro, Vol. 2 by nanashi