Found another misspelled word, when you're having sex with hikari ( dream I think only ) she says cum in side me, it's inside.
Also another one, when you find a mysterious chest, it says found treasure. It's spelled tresure in the game.
Another spelling mistake I found is when you peek at the girls, last day Rin says I know it, should be I knew it, You are a pervert.
Also, the Rival leader says : No! I still not losing, it should be I'm not losing.
Again, Leader, "Rin come back!!, He using Artifact, it should be, he's using an Artifact."