Shinji, who was dumped by his first girlfriend because he couldn't unhook her bra, developed a distrust of women. One day, he saw a sex guidebook and secretly practiced with his sister-in-law Nanami's bra at home. As he gradually regained his confidence, he couldn't help but be drawn to Nanami, who did housework with her large breasts swaying. Shinji impulsively hugged her and tried to remove her bra but failed due to lack of practice. Seeing Shinji depressed again, Nanami decided to encourage him and ordered a front-hook bra online...
