Great manga about a boy name Yousuke Toyokawa trying to find his long-lost sister ( yea it alike to Onegai twin.. somewhat ) by Shiotarou and illustrated by Suzuno Tetsuji

It started at ten year later after Yousuke got separated with his sister in an orphanage house, when he finally founded the couple that adopted his sister..sadly there is 2 girl that been adopted. The story then continues to find out which one is Yosuke's real sister.

I recommended since it fun (more then onegai twin for me) , good drawing , and great story.