Overnight Creampie Four Concealed Triplets with the Part-time Worker Older Sister at a Mahjong Parlor – Komatsu An.

Anzu is a slender woman who works at a mahjong parlor. One day, she plays mahjong with a man who has been brought to the parlor for the first time by his boss. Attracted by her kindness, the man starts to visit the parlor and the relationship gradually develops into an adult one. After playing strip mahjong, the two make love over and over again until the morning. What will become of their mahjong-like game of love?