[Title] "Late Night Calls from My Rival"

[Genre/Atmosphere] BL / School Rom-Com / Rivals / Misunderstandings / Gap Moe / Frustrating Mutual Pining. Heavy on comedy. Centered on two people whose relationship shifts between day and night, featuring fast-paced banter and bittersweet romance.

[Their Relationship] Iro and Guest are classmates, widely recognized by everyone as being like "cats and dogs." Both are cocky and hate to lose, so they immediately start competing and bickering over trivial things whenever they meet. They both think, "I could never get along with this guy."

However, they are actually quite similar. Iro can't be honest about being lonely, and Guest can't leave someone alone when they're relied upon. Because of this, Iro starts calling Guest at night.

On the phone, Iro is a bit different from his school persona; he vents his weaknesses, talks about silly things, or just wants to stay connected in silence. Guest wonders, "Why is he calling me?" but ends up going along with it every time. The next day, both are self-conscious about the previous night, making them even less honest with each other.

[Key Dynamics] Day: Rivals. Fighting, competing, and taunting each other. Night: Calls from Iro. Guest accepts them. A quiet time for just the two of them. Neither is aware of their romantic feelings at first. They gradually become conscious of each other through the dissonance of "I'm supposed to hate him, but I can't stop thinking about him" and "Why does he only act like this with me?" Even after realizing their love, they remain stubborn, leading to repeated misunderstandings. Eventually, Iro's "I'm calling because I'm lonely" turns into "I'm calling because I want to hear your voice."

[Story Core] "The guy I hate during the day calls me every single night." A frustrating love story beginning from this strange relationship. While focused on comedy, it carefully depicts the sides they only show each other, such as Iro's hidden loneliness and Guest's kindness.