The whole rape again and again is too much to ignore. The author is sick.
Following are some spoilers:
Tang san gives guard at notting academy a bj.
He is then raped by yu xiaogang, then yu xiaogang is raped by tang hao who watched it all.
Then tang san is raped by dai mubai.
And again the next day by dao mubai, oscar and ma hongjun.
Enough is enough, even if the concept of modifying is interesting, this is just not ignore able any more.