Don't think this review needs a spoiler tag... just tiny spoilers when it gets to plot holes...
The story is pretty refreshing, has good character design and lots of detail.
Honestly I enjoyed most of the reading, and I understand that since the MC is young and has shining traits most people would think he's a girl, the comedy was nice at first, but then it stops being funny.
I guess this story just isn't my cup of tea. Though I don't necessarily dislike stories that focus on MC's young age (under 10) for a lot of chapters, here the mc feels too mature for his age (and a lot of people around his age are too mature as well).
He is neither reincarnated nor has any legacy or 'grandpa' figure in the story which makes me feel that him being mature at 5 is forced by the author. And the way other girls talk about marriage when they also are just a few years above him doesn't feel well. A time skip when MC is so young would be much better imo, but hey, people have different tastes.
MC also gets dragged around a lot, and from what I see, he always complains instead of taking action. Gets mad at everyone for treating him as a girl but does nothing about his looks. Complains about his long hair but doesn't cut it.
There's a few plot holes, but nothing too major, such as a 20 year old beast having little magical achievements, then suddenly once mc starts 'cultivating' the beast matches his own cultivation rate. MC is praised as a genius by his teachers since he is so young yet has such a high level (for his age), but kids a few years older are much stronger then him even though they aren't geniuses or anywhere close. MC has a lot of elements which is like never seen kind of super-rare, yet can't beat someone a few level stronger than him (but in the same realm).
I'll be dropping this here, but hey, if you enjoy stories with a lot of focus on when mc is young go for it. It's also much better than any fast-food stories you find.
Though this doesn't feel like a 4.5 star for me, at the very least its way better than most 4 star stories on this website since too much 5 star spam happens.