Given a search, there seems to be a manga titled "Senryū no Oshi" or works close but Sennyuu Sousakan wa Zettai ni New doesn't directly hit.

"The secret mission of infiltration is absolutely new."

The translation heavily depends on the intended context and fixing typos or supposed errors based on that context.

Assuming a typo or variation, if one replaces or adjust for known manga,"Secret Mission: The Infiltration Operation is Absolutely New" doesn't find direct reference; adjust might reflect.