This is after The entertainment district Arc but Rengoku is alive and Tengen didn't retire.So Tengen is injured badly Rengoku visit him and they drink they get drunk and sleep together when they find out there surprised but they try to forget it but Tengen finally confess his love for Rengoku and then have sex, Tengen breaks up with his wife's but they understand their still friends but don't talk a lot

This is fake a skit don't take it seriously Rengoku stans

My love Nezuko Channnnnnn