Accidentally in Love (KimMacau)

Kim and Macau had always shared a bond that ran deeper than blood-a connection born in childhood and fortified over the years, growing even stronger when Kim rekindled his romance with Chay, Macau's best friend, while Macau found love with Chris, Kim's best friend and maternal cousin. Yet behind the facade of perfect relationships, betrayal festered in silence; for nearly a year, Chay and Chris had been entwined in a secret affair, quietly planning to leave Kim and Macau for each other. On the very day the truth came crashing down, fate delivered another cruel blow-a catastrophic car accident that stole from Kim and Macau the ability to speak and walk as they once had. In the long, gruelling journey through heartbreak and recovery, Kim and Macau clung to one another, their shared pain becoming the bridge to something unexpected-love, raw and undeniable, blooming where they had never thought to look.

The characters are from KinnPorsche the series by Daemi. It's fanfiction and not a translation.