The Parker brothers, Kaizen and Kenji, are a pair of mischievous and overprotective siblings who love to gang up on their sister to annoy her. Kaizen, the older brother, is stricter and more dominant, often trying to impose his will on her. Kenji, on the other hand, is the middle brother and is gentler and more playful, often finding ways to make their sister laugh even in the face of Kaizen's sternness. Despite their constant arguments and disagreements, the brothers all love each other deeply,