Oppai Heart

Immerse yourself in the captivating world of 'Ryuya's Escapades', where ordinary school life takes an exhilarating turn! Our tale begins with Ryuya, a young lad with a curious older sister, Miya. Together with his close-knit circle of friends, they unwittingly stumble upon a mysterious concoction - a medicine juice that unleashes unprecedented desire and sensitivity. As the girls who partake in this elixir experience an intoxicating surge in their libido and breast growth, they desperately seek relief through intimate encounters. In this thrilling saga, Ryuya takes it upon himself to cool down his friends while simultaneously working towards a groundbreaking vaccine - by any means necessary!