The theme might be centered around the idea of false identities. Plagiarism involves taking on someone else's work as your own, and in a love story, this could translate to characters presenting false versions of themselves to their partners, ultimately affecting the love they share.
One possible main theme could be discovery. If two characters are in the bush, they might be discovering not only each other but also themselves in a new and natural environment.
The main theme might be the idea of an unbreakable bond in love. 'Sticky' could imply that the love between the characters is so strong that they can't be separated easily. It could also be about the process of two people growing closer and their love becoming more and more firm, like glue that sticks things together. This kind of theme is common in love stories as it gives hope and shows the beauty of a deep and meaningful relationship.
Love across distances. Since Gandia and Tokyo are quite far apart geographically, the main theme could be about how love can bridge this gap.
The main theme could be acceptance. The yetis, being different from the common perception of what is normal, find love in each other. Despite their unique and perhaps a bit scary appearance to others, they accept each other for who they are.
The main theme could be love at first sight. Since it's in a hotel, two strangers might meet suddenly and feel an instant attraction.
Another possible theme is the power of memory in relation to love. How memories of a past love can haunt or inspire a person. The story might show how the forgotten love still has an impact on the present, even if it has been pushed to the back of one's mind for a long time.
The main theme could be unrequited love. Maybe one of them loved the other more deeply, but it was not fully reciprocated.
The main theme could be the imperfection of love. Given the word 'splinters', it might be about how love is not always smooth and can have cracks or broken parts.
The main theme might be the deep connection and passion a man has for food, similar to a love relationship.
The theme of loyalty could also be prominent. Arthur's loyalty to his kingdom and his knights might be tested against his loyalty to his love. He has to decide whether he will stand by his love in the face of opposition from his court or if he will side with his traditional allies and duties.