From Shoujo Manga Maniac: This book contains five enticing short stories. Story 1: The chemistry club invented a special hormone potion. Each bottle cost 500 yen. Riko-chan's boyfriend, Yuuki-kun himself is extremely cold towards love. Riko-chan hopes to move their relationship one step ahead, but in the end...? Story 2: Merry Kiss Story 3: Perfect Doll Story 5: Cupid's Love Arrow Read this manga from right to left