Revenge: Mrs. Wrong Vol. 1 (manga)
Beautiful, charismatic Mitsuki has it all. She's got so much, in fact, that she sends her more timid sister Tsukiko on dates disguised as her so Mitsuki doesn't miss out on other things. But one such body swap backfires after Mitsuki gets engaged: Mitsuki asks Tsukiko to stand in for her at a wedding planning meeting, and Tsukiko ends up falling into bed with Mitsuki's groom-to-be! Tired of playing second fiddle to her beautiful 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!