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

Komi-san's Accidental Written Ownership - Chapter 10 - namichwan57 - 古見さんはコミュ症です。, Komi-san wa Komyushou Desu

uesaka sumire – RABUJOI – An Anime Blog

uesaka sumire – RABUJOI – An Anime Blog

Title: Osananajimi - Slightly Tilting but Serious Reviews

General Content Ratings Thread 2.0: Same Principle, Different Format - Page 2 - Anime & Manga - UnevenEdge

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

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

pranks Chua Tek Ming~*Anime Power*~ !LiVe FoR AnImE, aNiMe FoR LiFe!

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

Nagatoro got the idea for the nipple-guessing game from the Shoujo Love Slave. : r/nagatoro