yametekudastop's manga / #Tongue piercing(1)

Toya and Kazuma both attend the same college and often join dating group parties. Toya is very popular with the ladies, same as Kazuma but Kazuma avoids any further movement due to a secret - his inverted nipples. Toya discovers Kazuma's secret and makes a move on him with a nipple play. Even though they were both straight, they ended up together. Toya is very lovable and accepting of Kazuma, including his inverted nipples.