This story takes place during the events of Monado Of Harmony.
https://www.fimfiction.net/story/418237/monado-of-harmony

It is also a sequel to A Bold New Style
https://www.fimfiction.net/story/346802/a-bold-new-style

While Yosh and Isabelle are off saving Equestria from total destruction Dark Light and Larimar are back home in Canine Crossroads avoiding Celestia's Royal Guard and the agents of S.M.I.L.E.

One particular evening the baby dragon, Larimar, is out playing hide-and-seek with Dark Light until the little hatchling comes across a bizarre pair of ponies dressed in funny costumes. Fearing they may be from S.M.I.L.E. prompts Dark Light to bring them back to his home where he feels he'd have a far better chance to evaluate and do what is needed to not be brought in for crimes against the crown. Unfortunately things don't go quite that way...

***

This story is rated Mature for sexual innuendo, diapers, diaper usage, and other themes of the sort in which are not appropriate for younger readers. It's not clop but definitely still intended for mature audiences.