Park Jimin is a first-year student majoring in English Literature, who wants University to be a new beginning. During his two first years of high school, Jimin had to deal with his bully, Kim Namjoon, who made his life miserable, thankfully, his best friend, Jung Hoseok, was always around to protect him. Jimin always felt distant from his father, not having the greatest relationship with him. One day, he finds out his father cheated on his mother, leading to his parent's divorce. Not long after, his mother marries Noh Min, who has a son, Jeon Jungkook. Jimin and Jungkook become step-brothers, however, despite not being related by blood, they cared about each other like real brothers, Jimin would do anything to protect Jungkook, especially when a certain minty-haired minion shows up in his younger brother's life.
Kim Namjoon is a second-year student majoring in English Literature, who has a difficult familial situation. His father is an alcoholic and an abusive man and, as the older son, Namjoon always ensures the safety of his mother and his 10-year-old sister, Maya, protecting them at all costs.
At a young age, Namjoon already had to deal with his father's aggressive behaviour so, to help him cope, he always resorted to casual relationships and bullying people, which led him to lose touch with his emotional side. Despite his messy familiar life, Namjoon has his best friend, Yoongi, by his side, and Seokjin, with whom he has a casual "relationship", but still Namjoon considers him a great friend.
Jimin crosses paths with Namjoon again, but he doesn't recognise him or remember how he made his life a living hell, so he decides to get revenge, but there's one problem...
Jimin falls in love with Namjoon.
Jimin and Jungkook had always been best friends for what they could remember. They basically grew up together, knew each other's family well and were like brothers: Jimin was the cheerful, sweet and responsible hyung who loves to take care of his loved ones, and Jungkook was the mischievous, troublemaker, yet adorable maknae.
At some point, though, Jimin starts to feel differently towards his best friend... who has, instead, a crush on Min Yoongi.
What happens when Jungkook asks Jimin to give him an hickey to make his crush jealous?