Responses
Unfortunately, no. I was only able to read the part of the accident and the mention of amnesia when someone shared some parts of it on Facebook. I also can't remember the poster's name. But from some snippet in the author's twitter, Seungyeon seems to be feeling the familiarity of Hosik's and their kid's presence—from what I could interpret from his reaction.
https://www.youtube.com/watch?v=1dO6JSHPb7o only 2 chapters though

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You know, the special chapters will be Seungyeon losing his memories after falling down the stairs while saving Hoyeon. He will forget about Hosik and their kids.
I'm camping again ╮( ̄▽ ̄)╭