This Is Screwed Up, but I Was Reincarnated as a GIRL in Another World! (Manga) Vol. 18

Ren agrees to supervise Ed and a few boys as they train at Arnault Smithy. Though she loathes the idea at first, Ren soon finds herself deeply invested in seeing her pupils grow! She brings the fellas to the Creation Expo so that the public can judge the fruits of their long, hard, labor, but there will be more than creations exposed at the venue. The slow life may be heating up!