Looking for recs - age play

Hi guys! So as usual a random concept came up in my mind and I thought "Damn, I wish there was a book like that." So as usual, I turn to my lovely redditors for help.

What I'm looking for is a story where possibly one of the MMC's are navigating/discovering themselves. The other, possibly older MMC takes on the role to guide their younger partner and together they discover the wonders of age play. The younger less experienced partner would become "little" to escape his stressful/chaotic life. None of this needs to be sexual, I more want to read something like this for the comfort aspect of it.

The older MMC should be very loving, caring, and would guide his younger partner through the experience.

Ideally there'd be no drama, such as break-ups midway through the book or a nasty ex making a comeback. I'm just looking for a cozy, relaxing read.

Bonus points if most of the story it's just the two of them, I feel like the "cozy" vibes are ruined if random side characters are involved too much.

Work your magic, and thank you!