Baka to Test to Shoukanjuu‎ - Volume 2, The Third Question

This is a story about a badass,

His fiancée, whom he had never met, had just broken off their engagement. He's then betrayed by his girlfriend and schemed against by her lover.His mother's legacy awakens him. No longer content with mediocrity, he transforms into a dragon overnight.

Reiji Saeki, who lives in the north eastern countryside town, lost his life in an accident during summer vacation. ……But before he knew it, a mysterious ball of light hovered in front of his eyes in a world of whiteness. That ball of light was a magician from a parallel world, and is looking for a person qualified to inherit the magic they had created to prevent it from being lost. Reiji, who rode on that suggestion, now lives in the parallel world Elgin, with a new body and powerful magical power.

Sang Qianqian, the eldest daughter of the Sang family, was eighteen when she fell in love with Shen Hanyu at first sight.”I love you, Shen Hanyu.” “But I don’t,” Shen Hanyu replied ruthlessly, his every word determined. “Not now, not ever.”

Furious, the wealthy daughter planned her revenge against Shen Hanyu but somehow discovered that he would eventually become a cold-blooded, tyrannical big-shot who would destroy her family! Her spite towards him skyrocketed, but after she left, he missed Sang Qianqian like crazy, who was now leading a carefree life after moving far away and faking her death. Suddenly, she heard the news that Shen Hanyu, now a magnate and seemingly crazier, had her grave exhumed and was now on the search for her. Alarmed, she quickly packed up her things to go on the run again… only to find the man himself standing outside her door, breathing through gritted teeth, “Running again? Go for it.”Knowing that escape was futile, Sang Qianqian changed her approach and tried to charm her way out of the dangerous situation, only to fail and end up submitting herself.***

Years later, realizing she had been tricked, Sang Qianqiang threw the divorce papers in front of Shen Hanyu. “I want a divorce!”Shen Qianyu simply pulled her into his arms and leaned in for a kiss. Pulling away after a long while, he asked hoarsely, “Still want a divorce?”Left dazed by the kiss, Song Qianqian mumbled, “N-No…” “Then call me darling.” “D-Darling…”Shen Hanyu nodded in satisfaction. “Good girl.”