We can conclude that the Yamaguchi-gumi's location in the Sakura Campus Simulation is in the Japanese mafia office. To reach the Yamaguchi-gumi, players could use the regional movement function in the game menu to quickly teleport to the vicinity of their destination. Then, the players would have to face the patrolling NPCs outside. They could choose to fight them head-on to show their strength, or use their jetpacks to bypass them. After entering the Yamaguchi-gumi office, players will face many men in black. They will need to increase their strength and weapon strength to fight them. The specific strategy and strategy could be found in the relevant strategy articles.
I'm not very familiar with this '1 nen a gumi no monster light novel'. It might be a relatively niche or new light novel. You could try to search for it on some specialized light novel platforms or communities to get more information.
One common theme is music. Since both Len and Gumi are associated with music, many fanfics use music as a way to bring them together, like in a duet or a music competition.
I'm not sure specifically what this '1 nen a gumi monster light novel' is about as it's not a widely known title to me. It could potentially be about monsters in a first - year classroom setting (since '1 nen' can mean first year in Japanese school system), but that's just speculation.
A common theme is music creation. Since both are virtual singers known for their music, many fanfics revolve around them making new and amazing songs together. For example, they might combine their unique voices to create a genre - breaking track.
Friendship is another common theme. They are often depicted as good friends who support each other. This could be through helping each other deal with personal problems or just having a great time together. In some fanfics, their friendship is the foundation for a more complex relationship later on.
One common theme is music. Since both Gumi and Ia are associated with music, many fanfics center around their musical collaborations, like creating a new song together or performing in a grand concert.
Adventure themes are sometimes seen. They could be on a journey to discover new musical notes, or they might be traveling to different musical worlds. This gives the writers a chance to create unique and imaginative settings, and it also allows for the development of their relationship as they face challenges and overcome obstacles during these adventures.
One common theme is music. Since they are Vocaloid characters, music often plays a central role in the fanfics. It can be about them creating music together, or how music brings them closer.