If you liked
Maga-Tsuki
|
...then you might like
Renai Boukun
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Both series consists of a protagonist that are lead into a harem situation due to supernatural events that are both connected by a kiss, if there is no kiss, then death would occur (In one manga, this only occurs to the protagonist). In addition, in both harems, there is a heorine with a little sister that is in love with their older sister.
If you liked
Iris Zero
|
...then you might like
Shindere Shoujo to Kodoku na Shinigami
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In both mangas, the main characters want to be isolated from everyone due to events that have occurred in their past (One wants to remain unexposed, and one wants to not get along people in fear of them possibly dying). In addition, the main heroine of each manga gets along with the main character even after the circumstances. One more thing to note is that both mangas are mystery mangas where the main character solves most of the cases in really interesting ways.