Lottery! Love triangle / Fukubiki! Triangle

A story of unrequited love... Miharu and Ushio are dating and leading an active sex life, but one day this idyll ends. Miharu suddenly falls ill during a walk and is hospitalized. Ushio, together with her sister Futaba, immediately heads there. Soon Miharu wakes up, but now she is not like her usual self - she is strict and capricious... While our heroine was sleeping, Ushio became a victim of Futaba's seductions and now, feeling guilty towards Miharu, his heart is torn apart...