 If you liked
Bokusatsu Tenshi Dokuro-chan
|
 ...then you might like
Yomeiro Choice
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Both cases girls from future come to present for a guy.
Yomeiro Choice is harem and ecchi heavy, and focuses on future children who want to convince their "father" to mate with their mothers, or else they will disappear.
Bokusatsu Tenshi Dokuro-chan is a more on the comedy side, about an angel protecting other angels from assassinating a guy.