Four short stories about adventures of little sisters:

1. Stray dog ~Leave it to Nana!~ (Nana ni Omakase!) 2. Paper doll ~Changing doll Mikan~ (Kisekae Mikan) 3. Family trouble ~Yui's papa is shamless!?~ (Yui no Papa wa Harenchi!?) 4. Secret feelings ~Momo and angel's flute~ (Momo to Tenshi no Fue)