Nakayama Tetsugaku - Braid Slave ch.3

The protagonist drugs a rich delinquent girl from the tennis club, in order to avenge his friend who got brutally beaten by her and her gang of girls with tennis rackets. Again the scene is fantastic.
A funny thing to note, the chloroform was provided by the nurse from ch.2, who became his "ally".
Source: g.e-hentai.org