Mr. Hei probably also felt that his "commission" was a bit vague.

Although Su'en didn't ask, he explained a bit more: "You should know by now that I have formed a loose organization with some like-minded friends. You should also have guessed the purpose of its existence. But because of this, the identities of some of our members are sensitive and it is not convenient to expose them too early. Otherwise, it will alert the higher-ups of the Black Tower... So, unless absolutely necessary, Miss Nineteen will complete this mission independently."

"Mm."

Su'en nodded as he listened, understanding his meaning.