Theo is a standard "nice guy" lead. While he’s likable, he mostly serves as a vessel for the reader to experience Helvi’s affection. The Verdict

The plot kicks off with a lonely protagonist, Theo, who attempts to summon a devil to end his solitude. Enter Helvi, a powerful high-ranking devil who is—contrary to expectations—incredibly adorable and affectionate. Instead of a soul-binding contract of servitude, they enter a contract of marriage.

At Chapter 11, the story has firmly established its identity as a low-stakes, high-sweetness domestic comedy rather than a dark fantasy. Here is a proper breakdown of the series as of the latest chapters:

Unlike many rom-coms that drag out the "will-they-won't-they," this manga starts with them already together. The progress is found in their emotional intimacy and small domestic victories, like cooking together or going on "dates" within their home.