Itaike na Kanoko Good End?

[Murakumo]

I;m currently playing Itaike na Kanojo (いたいけな彼女) a 2003 VN where the protagonist goes out with the class bullying victim as part of a bet he lost.

The problem: No matter how many times I've tried, I can't seem to reach a "good end" and instead keep encountering group abuse (sexual), getting stabbed(one of the bad ends), and going down the evil protagonist route. Anyone tell how to achieve the good end, if there even is one?

 

[overkill373]

http://www.foolmaker.net/game/a/itakano.html

just follow this walkthrough