Honestly, I like this ending. They could have rushed romance or have some forced drama, but it was just a very real concern that involved everyone at the end, and it concludes in a decent way.
I like to think harem ending is canon, but as long as these guys are together, I'm glad for them
It was sudden but These type of Mangas don’t seem to have a clear way of ending things without them going on for too long, but this one definitely needed a couple more chapters this ended a bit too early. We still needed more romance scenes, heck you could’ve added a handsome dude who could see ghosts to make it more interesting and that would’ve gotten more chapters.