Kishiwada is widely recognized as the school's number one delinquent. But, despite being the leader of a gang, he's hiding an important secret... which is... he has extremely sensitive nipples! They get erect from the slightest touch from the fabric of his clothes. Not only that... even his rod gets hard from it! Due to this, his everyday life is filled with troubles! The reason for this peculiar condition is that when he was a kid, he used to play a game called "Nipple Bingo" with his friend Andoh... And one day, Andoh suddenly reappears in Kishiwada's life! Make sure to follow Kishiwada's everyday-life adventures! (Source: Renta!)

Chiku Bingo★ has been published digitally in English as Nipple Bingo: Kishiwada, A Guy with Very Sensitive Nipples by Renta! since January 16, 2018. The series was officially discontinued on December 28, 2018 due to the author's sudden illness.