 If you liked
100-nichigo ni Shinu Wani
|
 ...then you might like
Mosquito War
|
Lots of differences, but they share the countdown in every single chapter (in Mosquito War it's the amount of living creatures, in 100-nichigo ni Shinu Wani it's the amount of days he's got left to live), creating tension and a feeling of loss.
<> Mosquito War is gore, 100-nichigo ni Shinu Wani isn't.