Onii-chan Asa made Zutto Gyutte Shite!

お兄ちゃん, 朝までずっとギュッてして! (original title)

Synopsis

Growing up I was a sickly child and due to this my parents designed an experiment to attempt to help me improve my immunity by hugging my sisters for extended periods each day. Eventually this ended up growing into more than hugging as the closeness to my sisters stirred up feelings from within that I just couldn't ignore.