My boy is in the team "win the heart through the stomach".
Also, at this height, I think that the proper title would be like These Two Will Be Married In 100 chapters.
Strange, I always thought it was literally 100 irl days, like those other manga that are affected by irl actions: an example being the skirt will shorten by every like in Twitter.
Mangaka-san seems to not want to fully use (or fails to use) the 100 day format lol, but this chapter really shows his writing and art style hahha if you've read any of his previous works, reading this will make you go "that's so him"
I feel like the "in 100 days" thing is literally just here to follow the trend (I'd personally say to make a rip-off of Croc-kun, but I don't want to start an argument here). It reminds me of isekais where the reincarnation part is useless and the author probably turned a fantasy story into an isekai one just to make it more popular.