Revenge: Kaedamakon

Timid Tsukiko has a strained relationship with her beautiful sister Mitsuki. Whatever her domineering sister needs, Tsukiko complies–even pretending she's her sister on dates! But when Mitsuki gets engaged, and Tsukiko stands in for her at a wedding planning meeting, she ends up falling into bed with Mitsuki's fiance! Tired of playing second fiddle to her sister, Tsukiko decides to take something for herself for a change. In this startling tale of intrigue and romance, revenge is a dish best served steaming hot!

(Source: Seven Seas Entertainment)

Included one-shot:
Volume 3: Nandemo Hoshigaru Haruna-chan
Volume 4: Fake: Gossip Reijou no Fukinshin Days