First Frost was a TV series adapted from Takei's novel, Hard to Coax. The drama told the story of Wen Yifan and Sang Yan who started living together by chance. The two of them were originally minding their own business, but after Wen Yifan found out from Sang Yan that he was sleepwalking, they had an interaction. The drama was scheduled to start filming in November.
Well, without more context, it's hard to say exactly. But it could be a historical novel where the first frost is a significant event in the historical setting. For example, in a story set in an ancient farming community, the first frost determines whether the harvest was successful or not, and this event could drive the plot, with characters facing challenges or making important decisions based on the arrival of the first frost.
I don't know who the author of the 'first frost novel' is. There are so many novels out there and without more information, it's difficult to determine the author.
Webtoon does have a few 18+ comics. However, their availability can vary depending on your region and the platform's content regulations. Some might be hidden behind age verification or specific access settings.
The first kiss between Drifting Wind Frost and Hideki Shikawa happened in the 20th episode of the anime. In this episode, Ryu Fūngyo confesses to Sho Shikawa and they kiss each other. This is their first kiss. This scene was described as very heartwarming.
Well, if we consider novels that might be related to 'First Frost', they could often have a sense of melancholy. First frost is a time that marks the transition from autumn to winter, so the novels might carry a feeling of change, perhaps of things coming to an end or a new beginning. The settings in these novels could be described in a way that reflects the coldness and desolation that first frost brings.