Things get even weirder for Kyousuke and his vexing little sister Kirino—and all their friends! Crushes, misunderstandings, jealousy, meddling relatives, beautiful girls . . . looks like Kyousuke is going to have to ask for advice from his sister. She might just help him, but only if he does her a big favor in return, and if he can stop saying just the wrong thing at the wrong time!
- The original “light novels” have sold over 950,000 copies in Japan.