Since the Night We Met by Kajal Rai

She’s the girl he was never meant to love.
He’s the man she was raised to hate.
Now they’re bound in a marriage neither of them chose.
And resisting each other may be the one war they’re destined to lose.

Siya Kashyap lived by rules of power and duty, until she broke them for her rival. Abhay was her first love, her forbidden desire, and trusting him with her heart nearly destroyed her.

Abhay Agrawal was born into privilege, but all the power in the world couldn’t bring back the one woman who became both his salvation and his ruin. Siya was his undoing, his temptation, and the obsession he’d burn the world for.
Now, years later, their families strike a ruthless bargain, binding them in an arranged marriage neither can refuse. What begins as a cold alliance erupts into a battle of wills, where every word is a weapon and every touch is destined to consume them, but the war between their families still burns in the shadows.
When history threatens to repeat itself and dangerous secrets come to light, Siya and Abhay must decide: Will they break the chains of legacy and vengeance, or lose the only love that was ever worth the cost?

If you crave enemies-to-lovers obsession, a ruthless billionaire who’d burn the world for her, and an arranged marriage where hate and desire collide, Since the Night We Met will consume you.

This is an interconnected series. It’s advisable to read from book 1 to understand the Ever Since universe better.