Watashi no Coffee Samurai: Jihanki Teki na Kareshi

The story is set in present day Seoul and involves a college student named Hemi who falls in love with a coffee vending machine named Jin. Jin is actually a samurai from the Sengoku period who wished to be re-born with an invincible steel body when he fell to assassins, hence the vending machine body.
(Source: akiba-station)