Can someone give me novel link in case if you remember the equivalent chapter as well that...

Search "cheat day spring of romance". Novel ch16 = manhwa ch23. Novel ch19 = manhwa ch27.

If you decide to read it, definitely take your time. Novel is short, super concise, full of subtext, and has really progressive ideas. The characters are edgy, complex, and intense, not those dumb "red flag/green flag" tropes in basic stories.

The manhwa cut over 50% of the novel, making it feel shallow and clunky. Glad the artist has good taste though.