In the roleplay experience, you get to play as the Yandere and the computer tells you what happens as you play with your yandere. You come up with where you put them (like a basement), who your senpai is (it can be any character you want), your name and other things as time goes on. Then the computer will describe the events that transpire, from minutes to days. Love them happily or punish them cruelly. It's your choice. Hope your senpai can see the love they have for you soon.