Responses
Following! I may have read some in the past but it is tough to remember them all.
following this
I have returned with an answer!
http://www.mangago.me/read-manga/kimi_to_kore_kara/ The mc is def homicidal, and the story isn't too dark at all. But this is a sequel so I would recommend reading http://www.mangago.me/read-manga/konya_mo_nemurenai/ first to understand it better. Sorry I couldn't be of more assistance, homicidal mcs are unfortunately hard to find!
ISO a yaoi with the MC is delightfully homicidal. Not looking for dark and twisted but twisted and charming. The ones were you look at the mc and thing ahhh ain't you cute and certifiable. Hope this isn't to vague. Your advice is much appreciated.