All images scanned from the Boku no Pierce Girl story in the Miss Rain manga, using a long-suffering Canon CanoScan 620P, and subsequently cleaned up in Paint Shop Pro. Feel free to take and appreciate. They're presented in order of appearance.
"Ne, Yuuki... Even if, someday, you find a girl you like... stay with me... Because we're twins."
Yuuki looking for his bat
Yuuki, you'd better watch out when Yuumi's that peppy...
Twins silhouetted against the sunlight
Yuumi exulting cutely
But Yuumi, you're sick...
Yuumi sees Kageura...
...and they get along
Kageura in the rain
Yuumi talking to Kageura
Twin pain is shared pain
Their mother is puzzled...
Yuuki thinks things over
The colored Yuumi on the back flap