The unique setting of the dungeon being related to the protagonist's room makes it stand out. It's not a typical dungeon in a far - off land but something more personal and close - to - home.
One similar light novel could be 'DanMachi'. It also has a dungeon - exploration theme with interesting characters and an engaging story. The main character goes on adventures in a dungeon - filled world, much like in 'boku no heya ga dungeon light novel'.
One possible light novel could be 'Boku no Heya ga Dungeon no Kagi wo Motsu' which combines the concept of a room ('heya') with a dungeon - like adventure. It might be about a protagonist whose room holds some sort of key to a mysterious dungeon.
I'm not sure if there are a lot of light novels specifically with 'boku no heya' in the title. However, if we consider related concepts, there might be some that are about a personal space which could be symbolized by 'boku no heya'. For instance, a light novel where the character's room is a place of self - discovery. The protagonist spends time in his room thinking, growing, and facing his inner demons. This could be a really deep and character - driven light novel.
Well, without having read 'boku ga yuusha de maou no boku de light novel', it's hard to say precisely. However, from the title, it seems to imply a story where the main character has a dual nature of a hero and a demon king. This could lead to all sorts of interesting plotlines, like internal struggles between good and evil within the character, or perhaps a story where the hero - demon king has to navigate a world that views these two identities as completely opposed.
In the phrase 'dakara boku wa h ga dekinai' from the 'dakara boku wa h ga dekinai lemon fanfic', 'dakara boku wa' is straightforward Japanese for 'therefore I'. However, 'h ga dekinai' is a mystery. It could potentially be related to a Japanese grammar structure that is being used in a non - standard or creative way. Another possibility is that 'h' is a variable or concept within the world of the fanfic that the protagonist is unable to perform or possess. Without more context, it's really hard to give a definite meaning.
It might be about a story where the protagonist has a dual role, being both a hero and somehow related to the demon lord. However, without actually reading it, it's hard to say precisely.
Yes, it has a certain level of popularity, especially among fans of visual novels and those interested in stories about friendship and personal relationships.
You might be able to find it in some Japanese bookstores if you're in Japan. Also, online platforms that sell Japanese light novels could be a good option.