Dead tired and at a dead end, Yuuji Tanaka's life isn't going very well. Having just been fired from his horrible office job, he expected to wake up in his mediocre apartment alone for yet another day. What he wasn't expecting, was to find there was someone new living in the apartment with him. She's small, cute, a handful, AND NOT EVEN REMOTELY HUMAN! Now Tanaka has to contend with his new life as "parent" to a creature that has no concept of life on Earth, and through their shared experiences they'll change each other's world forever.