Who is Baron Hilo? He is a mysterious figure who comes and goes without a trace. He is also the number one enemy of the X-Agent Organization!
The "last-place" agent Greya accidentally becomes a special agent and sneaks into the Orlondu Academy, where she encounters three mysterious members of the Baron Detective Agency - the "passerby" Zikeyaro who likes to pretend to be handsome, the deep-minded "little shota" with a super high IQ, and the beautiful boy Dougezeya with a mysterious and powerful background.
Could one of them be the Masked Baron Shiloh?
What kind of unknown entanglement exists between Baron Shiro's Mask and the X-Agent Organization?
Graya, who is thick-skinned and cannot sense malice, always puts people around her and herself in dire straits, which puts her position in the organization in jeopardy, but she eventually gets close to the truth by accident!
| Short Title | : | SRB |
| Alternate Title | : | 希洛玫瑰男爵 |
| Status | : | Completed |
| Author | : |
| Genre | : | |
| Weekly Rank | : | #147 |
| Monthly Rank | : | #338 |
| All Time Rank | : | #8 |
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