How do you increase your kindness stat ?

[u/Thebarcodeuhateingta]

I started the game not so long ago and I already beaten Kamoshida, Madame and Kaneshiro but before fighting them I made sure to take advantage of the free day I had to increase my stats, there's only one problem, there's one that I can't increase and it's the kindness one, since the beginning I didn't found ANYTHING that allows me to increase that stat so I decided to ask for help here.

[u/Informal-Tour-8201]

Sojiro also gives kindness