Wagamama Fairy Mirumo de Pon! (we're currently subbing this, shameless self promotion)
Usagi Drop
Ika Musume
Aishiteruze Baby
Ichigo Mashimaro's OVAs (main series wasn't as good)
Ore no imouto comes close. Very close. MAL only rates out of 10 so I gave it a 9 XD
You should read the strawberry marshmallow manga.