My serious older sister, who works for a large company, works at a brothel with large breasts. She's a NEET (Not in Education, Employment, or Training) and I, a college dropout, have a no-condom, no-penetration sex toy contract with her. (HMN-462)

My sister's friend, Nuan, came to visit. She's incredibly cute, has huge breasts, and is also very talented; she even got a job offer from a big company. Unexpectedly, I discovered Nuan on that infamous escort website!! To avoid being silenced, I, a NEET, made the gorgeous Nuan my sex toy! In the shop, ignoring my sister's presence, I ruthlessly thrust my red-hot penis into Nuan's deep cleavage! Injecting my genes into her trembling breasts!! Nuan accepted me with a smile, and I actually developed feelings for her!