Lezhin Comics sometimes has free manhwa available. It has a diverse selection, but you might need to keep an eye out for promotions and limited-time offers.
The theme of the passing of time and how it affects people is significant. As the story progresses, the characters are forced to confront how age has changed them and their opportunities. Also, the concept of friendship is a theme, as relationships are tested and developed throughout the novel.
The phrase 'leer una novela' simply translates as 'to read a novel' in English. This is a straightforward translation, and it's used when talking about the activity of engaging with a novel for enjoyment or study.
I'd suggest looking into apps like MangaToon or Manta. They sometimes offer free access to manhwa. Just make sure to check their terms and conditions for any restrictions.
Tappytoon is another option. It offers a good collection of manhwa and has a user-friendly interface. Some of the series are updated regularly, providing you with fresh content to enjoy.