From Kokoro no Oasis:

Tomas is a proud and fearless assassin who has never failed a commission. So what happens when he's commissioned to kill Myra, an immortal vampire?

In the middle of an escape, Lilith, the head of a group of thieves, is injured. She is rescued by the young aristocrat Jean Rhode, but in exchange for being nursed back to health, he demands that she pay him with kisses!
Also contains the oneshot Nil no Koi☆Mahoujin
(Source: MU)

Nil, a 5th grader in an academy of magic falls in love with Kowloon, her scary-looking upperclassman. Will she be able to pluck up the courage to ask him to the academy’s dance party? She might need magic to give her a helping hand.