While my parents were on a trip, I was home alone. Then my sister came back with her friend who is rumored to be super promiscuous! My sister's friends all have huge breasts, and seeing them made me flustered. Then my sister said, "You can do whatever you want with them," and I got extremely excited watching her friends talk dirty non-stop. The protagonist mistakenly thought, "I can have sex with anyone," and started fantasizing and getting aroused. In this unbelievable heaven-mode situation, the protagonist's rampage knew no bounds, successively penetrating my sister's promiscuous friends one after another! An unexpected series of lucky perverted events in a "wouldn't it be great if this happened" harem fantasy!!
