Walk Koromaru every time you can
If you’re a good-hearted person, you should want to spend as much time around dogs as you can in this life. This holds true for Persona 3 Reload as well. Koromaru will ask to go on walks some evenings, and not only will he get to frolic and have a good time, but more often than not, someone will want to join you both. So you get to hang out with a buddy, Koromaru gets some fresh air, and he’ll bring you back a useful item at the end.
