H08460 - Ane Wa Yanmama Junyuuchou 4K60 - 01

A man finds himself in a situation where his older sister, a strict and mature woman, is in the middle of a breastfeeding ritual. She is the only one present, and she takes charge of guiding him through the act. The animation is rendered in 4K60, with close-ups on her expression and the physical contact.