>multipart doujin about a chemical leak with different girls for each of the four parts
>first girl is childhood friend who gets fucked by the MC but starts getting doki dokis from it
>second girl is bully who reluctantly gets fucked
>third girl is nerd who always had a crush on the MC and is now a hot chick who sucks his cock
>except it turns out swallowing his cum reverts the change
>every girl turns back except the childhood friend who has fallen in love with MC
On one hand, you love to see the cute childhood friend falling in love but on the other hand the nerd got screwed over bad. Also the author never made another GB work again, feels bad