Pandaberry__
Most people have imaginary friends when they're kids, but most people also outgrow them. Jae-Jun, the youngest son of the wealthy CEO of TTL corp. (Tech TooLee corporation), has also grown out of his just like anyone would. Imaginary friends are also supposed to grow out of their human so that they can move onto the next kid, but what happens when Jae-Jun's doesn't outgrow him?
Setting: South Korea (sorry, I read too much WEBTOON these days)
WARNING: Rather appropriate, but there may be some bleeped out swearing and immature/inappropriate humour (recommended 12+)