 If you liked
Scarlet
|
 ...then you might like
Hima nanode Hajimete Mimasu.
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Both Hima nano de Hajimete Mimasu. and Scarlet's first story have a handsome, highly affectionate and childish character as the love interest and both have codependent obsessive relationship.
The main difference between the couples are that Hima nano de Hajimete Mimasu is a lot lighter and fluffy Scarlet (or at least the first story) is a lot more dark and twisted.