Hōnyū ganbō: Nōsatsu paizuri ijime

豊乳願望 悩殺パイズリ締め

Also known as Hônyû ganbô: Nôsatsu paizuri ijime, Hounyuu ganbou: Nousatsu paizuri ijime

Kozue is a woman with a small bust who has always longed for a fuller figure, while her roommate Rena is busty but prefers the convenience of a smaller chest. One day—perhaps because their prayers were answered—they find themselves swapping bodies.