Sato, a bad boy commits an act with his childhood friend, Mei, (innocent honor student) with a peculiar drink. A distorted affection is born from a good relationship with a childhood friend. Two people drowning in eccentricity and madness. What will happen at the end ...

Tried my best to give y'all the gist. Here's the original:

不良少年が幼馴染の清純な優等生を薬で犯しながらハメ撮り
幼馴染との良好な関係から歪んだ愛情が生まれる。
偏愛と狂愛に溺れていく二人。
最後はどうなってしまうのか…。