No, chapter 32 is the day after his birthday.
And if i remember correctly, Jeongie asked to come over to his house when they were at school and Hangyul said no because his parents were there.
And yet they just said he most have spent his birthday alone. So back to my comment, did they not tell him they were leaving or did he lie and we dont know why yet
I’m sure it was that Hangyul told Jeongie that his parents were celebrating with him (and they were supposed to) but they cancelled last minute since they had some business or something like that, so Hangyul ended up spending it alone. Then when Chorong came over to Hangyuls house, Hangyul lied and told Jeongie that his parents were still at his house so Jeong can’t come over. And then I’m sure you know the rest from there

"ever since that other thing happened" from the page 45. (Naseon talking about Hangyul). Am i supposed to know what he means? Feel free to spoil me if thats something we will know later.
Also didnt Hangyul tell Jeongie he couldnt come to his house because his parents were there (the day of his birthday)???? And now apparently he spent his whole birthday alone? Does that mean he came back from school and poof his parents ghosted him on his birthday without warning?