So I seem to have forgotten the name of this manga that goes something like this:

-Main protagonist really loves a specific galge.
-One day computer screen suddenly shows strange message and he pops in the disc to his favorite game.
-Next day the heroines appear in his life like they were always there.
-Protagonist later learns living a galge is not as easy as in the game(go figure).
-One heroine will supposedly die if he doesn't prevent it and in the meantime she's getting bullied and badmouthed by protagonist's classmate.
-Another keeps on getting ignored and seems to be falling into depression.
-Transfer student heroine confronts protagonist before falling into character due to noticing something going on.

Can't seem to remember much else. But yeah it goes a little something like this.

Galge no Sekai yo, Youkoso!

This would have been the first result if you searched galge. Not saying that in a mean way, just trying to be informative. Though I did know it off the top of my head. Or more specifically, I remember it had "galge" in the title.

I really should have done that instead of trying to find it using the "video games" tag -_-. Anyway thanks again Akukame.

sence im already here, have you read metal heart kinda seems like what you wanna read

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"Sanity is for the weak"

Hmm may pick it up sometime. Thanks for the recommendation!