Point out the changes in your boyfriend Yahata-kun!
If you fail, you get reset back to August 1st and Yahata-kun's pattern changes.

※Find things about Yahata-kun that are different from yesterday.
※The changes aren't random. Sorry.

"Let's make a game with a strong female protagonist" is what I initially planned at the start, so there IS girl x boy romance. All boys in the game are passive (This is what the creator decided, so it must be true.)