These are the stats needed to reach certain endings. Clarisse, for example, prefers Charm. For a good ending, for example, you need to reach a value greater than 200 by the end of the game. This is one of the conditions, but not the only one.
It's just ... I ran one girl 5 times, but the only thing I got was 2 hearts. I don't know how to do this ... It's a little depressing. Why can't I see him or even give him a hint? Simply because of this, the desire to play gradually disappears.