Love Laboratory

From Mangaupdates:

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…?

This book contains five enticing short stories.

Title: Love Laboratory
Creator: Momoyuki Kotori
Status: Complete
Genre: Shoujo, Romance, Smut