Sukinano ni Suki Dakara

From Chibi Manga:

Because I like you, I won't tell you that. Because we were close for long, I can't tell you. Kei and Ichika became brother and sister after the remarriage of their parents. They're hanging out with their best friends, Youichi and Nanase. And that's the beginning of a rectangle love between those four.

Also included in this volume is a story called

• Yubisaki ni Atsuku