Parallel sex: Chijo ga hisomu toki(2021)

Ninomiya Hikari's movie debut. Masao, a middle-aged man who feels pain in his work, is leading a rutted married life with his wife, Yasuko. In front of Masao, his first love, Kirie, appears as she was at the time. Masao becomes able to go back and forth between the real world and another world...