Kagachi-sama Onagusame Tatematsurimasu: Netorare Mura Inya Hanashi The Animation

On the 2nd anniversary of the marriage, Takahiko realizes that he is no longer getting sexually excited with his beloved wife, Manami. He is aware that this impotence is because of the strange custom he witnessed in his hometown, where a naughty feast takes place every night in the dark throughout the summer festival. Long ago, he ran out of his hometown, horrified, but now he realizes that he can cure himself only by going back to that place...