If you're looking for manga similar to I am a Killer Maid, you might like these titles.
J is a lone assassin feared as "untouchable" in the underworld. Megumi is a lonely girl who has no place at home or school. When the two meet, an unexpected story begins.
A meeting on the bus to the underworld. Fate… Responsibility… To face it all or to run away?
The two siblings who unconditionally swapped bodies have to pursue each other's crushes in order to swap back. One minute we were bickering, and the other minute, we're swapped. I will only swap you two back if you guys get each other's true loves.. But, hehehe~ My brother's body is so useful!
After an awkward encounter on her vacation, Wei Lan swapped bodies with a boy named Bai Yuan! Is this heaven's plan, or a trick of fate? Their strings of destiny follow the drifting star in the water.
I, the leader of the popular boy band TREE, somehow exchanged my soul with a girl! Moreover, she's my teammate Ji Shan's fan and my anti-fan! She used my body to live in the apartment of TREE. She slept on my bed and got close to Ji Shan. She was even trying to dig out my dark secrets! I have no choice but to win her heart over!