Shinonome Ren suffers from an unusual disorder that turns him into a child whenever he is stressed, and the only way to return to normal is to be pampered by his wife.
Watashi no Otto wa Stress ga Tamaru to Shota Kasuru is a completed manga by Ziki Masaya, first published in 2022. It blends romance, comedy and slice of life. You can read all 37 available chapters of Watashi no Otto wa Stress ga Tamaru to Shota Kasuru online for free on MangaPulse; the newest is Chapter 24.6, added 2023-01-09. The series is finished, so you can read it from start to end in one go.