Tanjirou: you both went to a carnival and ate a lot of food together while watching fire works
Zenitsu: you both had a picnic under some cute cherry blossom trees
Inosuke: you both went to get acorns 🥜
Tomioka: You both just went to a walk and drank tea together while talking about their lives
Sabito: He took you to the water fall where he, Tomioka and Makomo train
Rengoku: you two were training together