Total Recommendations: 2
If you liked
Deadman Wonderland
|
...then you might like
Real Account
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MC forced into "sole survivor" role (kind of). "Befriends" a female within the "prison". Masked Villain whose intent is to kill the MC and others. A prison with deadly games. Yeah, sounds similar enough. Now let's read it.
If you liked
Iriya no Sora, UFO no Natsu
|
...then you might like
Captain Earth
|
Both titles involve a sort of boy meets girl, girl has alien origins, boy attempts to rescue girl, secret government stuff, and... You'll have to watch for yourself, I'm not spoiling any more.