Cecil is younger than Spencer, he might just be drawn a little older compared to his actual age in the manhwa or he's just really tall. I'm not sure if there's an inconsistency in the novel (I'm hesitant in reading KML novel but I did read KMIYC) since iirc KML was released first before KMIYC.
But I believe it might be just an error in the manhwa, since even here in the chase's commercial scene when he's a kid his eye color is wrong. And Pete's blond hair in KML (manhwa) is the same blonde as Josh's, but in KMIYC (novel & manhwa) his blonde hair is the same as Chase's not Josh's
KML is not the main storyline, it was just relased first. If I have to guess, because the omega is korean and Keith is Grayson Millers friend, so you have a connection between the two main series of that universe. The first the author came up with is actually Grayson's story, it was just released much later.lol But for both series 6 stories each were planned from the start.
Kiss me if you can , belongs to the "...if you can" series, since it's Chase Miller's story. For the "Kiss, me..." series the author so far only released KML.
KML, KMIYC, and RAIYC take place around the same time. You already see Yeonwoo pregnant with Spence during that time, while Josh made it a condition to be married first, before he is willing to get pregnant with their second child (Cecil). So Cecil is probably a year younger than Spence.
The Millers are all extremely tall, even as children. For example the tallest Miller, Nathaniel (2,18m), iirc was already past 1,80m in the 6th grade.
But if you don't know all that, it's easy to come to the conclusion that Cecil is older than Spence.
What I still find strange is that some in the KML comments thought that Pete and Cecil are twins, while Pete is clearly taller than Cecil.
I just finished reading this in one sitting (it’s 3 a.m. ) and I have a question about Cecil. In the main storyline, Pete and Cecil are older than Spencer, right? But at this point in the story, Yeonwoo was already pregnant with Spencer, while Cecil hadn’t been conceived yet. Am I missing something, or am I just too sleep-deprived?