Yuka is a cute younger sister who spends all day lounging around in her room, doesn't have a job, and is coaxed into doing naughty things by her sweaty, stupid older brother.Her brother, who she doesn't even like and is related to her by blood, kisses her on the tongue, puts his cock in her mouth, and thrusts her pussy without using contraceptives, and she has no choice but to orgasm. This is Yuka-chan♪