A hot and humid summer day ... Rina on the way home from shopping tries to enter the house, but accidentally slips her hand and throws her luggage away. Yamada, who lives right next door, is back there. Yamada picks up his luggage with Rina and notices that the sweat on Rina's neck flows down into the cleavage. From the depth of the valley, it is easy to imagine that Rina's breast is a tremendous size, and it is clear that the protrusion protruding from the cloth of the clothes is Rina's nipple. Yamada finds out that Rina is a no bra and gets mad at her reason.
