Relationships in general are probably a key theme. This includes not just romantic relationships but also friendships and how they interact with the main plot.
One similar light novel could be 'Toradora!'. It also features complex relationships between characters in a school setting, much like 'fuufu ijou koibito miman light novel'.
I'm not sure as I haven't read this particular light novel. But generally, from the title, it might explore themes of love and betrayal. 'Netorare' often implies a situation where one's partner is being taken away, so it could be about the emotional turmoil that comes with such a situation in the context of a romantic relationship.
Since I don't have detailed knowledge of 'watashi ga koibito light novel', it could potentially be about a love story. Maybe it tells the tale of a protagonist's search for love, their encounters with different people, and how they navigate the complex emotions that come with falling in love. It might also include elements of Japanese culture and society as light novels often do.
I'm not sure specifically as I haven't read this particular light novel. It could potentially be about a character who has some extraordinary skill beyond the normal state of things, given the words 'jouji ijou skill' which might imply a supernormal ability in an abnormal frame.
Self - discovery could be a theme as Shirayukihime deals with her relationships with the seven. She might learn more about herself through these interactions.
Some specialized Japanese or Asian bookstores might carry it. Also, you can look into second - hand bookstores, as sometimes they have rare or hard - to - find light novels. Another option is to check with local libraries. If they have it, you can borrow it first to see if you like it before buying.
I'm not sure specifically about light novels exactly like 'koibito o netorare light novel'. However, some popular light novel series that often deal with relationship themes are 'Sword Art Online' which has complex relationships among the characters within a virtual world setting. Another one could be 'Re:Zero − Starting Life in Another World' where the main character has various relationships with different people in the new world he is in.
Given that we don't have a clear understanding of the exact themes in 'hazure waku no joutai ijou skill light novel', it's a challenge to recommend precisely. But if it has elements of characters with extraordinary skills in an interesting setting, you might like 'Log Horizon'. In this light novel, the characters use their skills and knowledge to navigate a virtual world. There are also elements of strategy and development related to their abilities which could potentially be similar to what the unknown light novel might offer.
Friendship and loyalty could also be important themes. The characters within the 'light kingdom' would need to rely on each other, and the story might show how their relationships develop and are tested in the face of various challenges.
The theme of friendship is likely prominent. Characters may rely on each other, support one another through difficulties. Also, the theme of redemption could be there. Some characters might be seeking to atone for past mistakes or wrongdoings in the story.