A common theme could be friendship. Given their relationship within their group, fanfics might explore the deep bond of friendship between chuu and yves. Another theme could be adventure, where they embark on some exciting journey together.
Adventure is also a theme. Writers might create scenarios where they embark on an exciting journey, perhaps in a mysterious land, which tests their relationship and individual strengths.
I'm sorry, I don't have a specific chuu and yves fanfic to recommend directly. But you can try looking on some fanfiction websites like Archive of Our Own (AO3). There are often many fan-written stories about different pairings in the K - pop world, and you might be able to find some great chuu and yves fanfics there.
Some chuu yves fanfics explore the idea of them being in a parallel universe where they are not idols but regular students. It shows a different side of their personalities as they navigate through normal teenage life, with school, friends, and first loves.
I'm not very familiar with this specific 'read suterare yuusha wa kitaku chuu light novel'. However, light novels usually cover a wide range of genres such as fantasy, adventure, and romance. Maybe this one has a story about a hero who has been abandoned and is on his way home. But that's just speculation.
One possible theme could be redemption. Since the hero is 'suterare' (abandoned), perhaps the story is about him redeeming himself or finding a new purpose on his journey home.
Well, the parrot in the comic strip could serve as a messenger, carrying important plot-related information. Or it could simply be there for decoration, making the panels look more lively.
You should check out 'One Piece'. It's been going strong for a long time and has a vast, exciting world. Another great one is 'Demon Slayer' with its amazing art and action.