Bad Habits & Bruised Hearts - DayDiesel

At Bangkok's most elite arts university, Diesel Danaiphat Sasipattana is untouchable - heir to a political dynasty and luxury fashion empire, infamous for reckless racing, gambling, and rebellion. Beneath his charm and arrogance, however, Diesel is emotionally shattered by years of control and abuse from his powerful father. He hides his loneliness behind chaos, parties, and dangerous behaviour.

Day Issara Jittiphat is the opposite: quiet, hardworking, and endlessly dependable. While balancing art school and two jobs, Day secretly lives under a terrifying curse tied to his leap-day birth - every four years, tragedy strikes someone he loves. After a lifetime of loss, he avoids emotional attachment, believing closeness only leads to pain.

Their lives collide when Diesel crashes his motorcycle near Day's apartment during a storm. Expecting judgment, Diesel instead finds kindness as Day silently helps him. What begins as reluctant encounters slowly becomes something deeper.

But their growing relationship faces impossible obstacles: Diesel's father wants total control of his future, and another leap year is approaching - threatening to destroy the happiness they've finally found together.