 If you liked
Mujaki no Rakuen
|
 ...then you might like
Ore ga Doutei wo Sutetara Shinu Ken ni Tsuite
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* Both has a male protagonist
* Both goes back in time
Mujaki is more loli-oriented + shota, in Ore ga Doutei it is more oriented in High school.
While Mujaki certainly in my opinion has more ecchi, Ore ga Doutei has some too but not a abundance of it. I'd say Ore ga Doutei is more plot-oriented as well with a clear goal.