"Sakurairo no shita de kuchizuke wo" (A kiss under cherry blossom color) by: Umekichi

Here's another Shimako story with her taking on a more bolder attitude with her new little sister, Noriko. I just knew that Sei's influence would finally rub off on Shimako! Here's the links:

http://www.megarotic.com/?d=3L82II7V