Just two volumes ago, Archdemon saw the heroine getting age-reversed and just two volumes later, the author reuses the same trope again, only this time it's our hero getting kiddified! While I was rather apprehensive at such a quick reuse of the gimmick, this turned out to be one of the better volumes of the series.
This is mainly due to the major character developments of Zagan here, as the age reversion drains away most of his powers, and in the course of trying to cancel the effects, all his good deeds over the past 5 volumes get repaid and he slowly realises that he may not be as lonely as he asserts to be. I really liked this part, as Zagan is a very likeable character, even if his tendency to say rough things makes his persona feel more abrasive than he should be.
There's also no lack in the lovey-dovey flirting between our main couple as well, as Nephy relishes greatly the chance to spoil a very cute Zagan in this volume. I definitely do not recommend reading this in public, as the chance of grinning madly is very very high.
6 volumes in and I think Archdemon has really hit a very good stride, in terms of balancing the character development, romance and intrigue. A very good fantasy romance series that I'd recommend to light novel readers.