"Immersed in Happiness" is a modern romance novel intricately portraying emotions between men, belonging to the boys' love (BL) genre. The story revolves around the deep and intricate emotional bond between the main characters, Yoo Sheng-roo and Choo Hwai, blending elements of the criminal underworld, revenge, and power struggles to tell a complex and heartfelt love story between men. The narrative begins with an accidental encounter between Yoo Sheng-roo and Choo Hwai. Yoo Sheng-roo is a significant figure in the underworld of Lan Province in China, while Choo Hwai is a finance student at Qing University. Their chance meeting ignites Yoo Sheng-roo's intense interest in Choo Hwai. As the story unfolds, the relationship between Yoo Sheng-roo and Choo Hwai grows increasingly complex. Initially, Choo Hwai holds deep reservations and resistance towards Yoo Sheng-roo. However, as time passes, Yoo Sheng-roo's care and protection gradually move Choo Hwai, deepening their mutual affection. Throughout this journey, Choo Hwai begins to embrace and confront his feelings for Yoo Sheng-roo. Moreover, the novel delves into the themes of power struggles and vengeance within the underworld. Yoo Sheng-roo's position in the criminal world forces him to face challenges and threats from various factions. Simultaneously, Choo Hwai's past draws him deeper into the vortex of underworld conflicts, putting their relationship in jeopardy. "Immersed in Happiness" is more than just a romance; it also depicts the complexities of human nature, the battles for power, and individual growth. The characters are distinct and well-crafted, struggling with emotional and realistic dilemmas as they strive to find their own paths to happiness. The story is replete with twists and turns, making it a compelling modern romance novel worth reading.