What happens when you have one guy living along, and two girls find him, and saying their his twins! You get the Onegai Twins.

This spin off the Onigai Teacher Series, a guy name Maiku Kamishiro, grew up in an orphange with a picture of him and his twin, the only problem is, two girls come to him and also have a copy of the picture, so who's a twin and who's a total stranger, you can only find out by watching Onegai Twins!