 If you liked
Kaijin Bureikou Lullaby
|
 ...then you might like
Kasutoro Shiki
|
Anthologies by non-mainstream mangaka that collect some of their experimental manga works. Both the plots and the presentation is highly non-traditional and aims at mature reader as it contains a lot of explicit imaginery, so much that non-experienced reader could get really disgusted. Behind those images is an interesting point though.