In which Mukuro argue with Shining.Sanity loss alert.Rated K to be safe

The Vongola primo and Conchiglia primo made a promise and now it passes on to their descendents.

Etsuko was a normal student until her bestfriend, Yukiko, a famous song writer saw her potential to become a model. Yukiko secretly went and apply for a model job that Etsuko did not know about. The company accepted her and Etsuko aws forced to work.