Love the vibe of this song, lots of sentimental "feel-good" elements (with a hint of anime OP XD)!!
The form and composition all together sound pretty solid! The chords and the guitar lines sound really well together and there's really good dynamic contrast between each section of the song! Also great vocals!! I don't speak spanish, but everything sounds really natural and fit entire vibe of the song really well! Overall it's a really well put together song and I don't really have any issues on how it was written!
Although I don't really have issue with the composition of the song, the mix needs a little bit of work. The low frequencies are brought out a bit too much and the high frequencies are drowned out too much throughout the whole track. I'd turn down the overall volume of the bass just a bit and bring out a little bit more treble in it as well. Also the cymbals in the drums need to brought a lot more too, I can barely hear them. You can also probably turn down the volume of the rhythm guitars during the chorus just so that your voice can come out a bit more there.
Those are the biggest notes I had, but none of those "issues" really took away from the song as a whole. I felt like this was really well put together and I could see myself listening to this on repeat without a problem! Keep up the awesome songwriting!!