Onii-chan, Asa made Zutto Gyutte Shite! Episode 1 , English
There are five rules in the Onami household where you live. Rule number one, you hug your little sister every day. rule number two, you have to hug her for at least 10 seconds. Rule number three, make sure to sniff your little sister well. Rule number four, you have to redo all previous rules once you finish your hug. And last but not least, rule number five, you have to make sure to hug her with affection!
With these rules in mind, you can now start your perfect harem that includes four little sisters.