what if rengoku got his mark

Adventure is another theme. For instance, some fanfictions might send them on a quest in a magical world where they have to use their unique skills (Mark's rapping and Jackson's martial arts skills perhaps) to defeat an evil force. This gives the writers a chance to show their creativity and also build on the dynamic between Mark and Jackson.

The 'bottom mark got7 fanfic' might be special because it offers a different perspective on Mark. Usually, in fanfics, different character dynamics are explored. If Mark is in a 'bottom' role, it can show his more vulnerable or submissive side compared to his normal image, which can be really interesting for fans who like to see different facets of their favorite idol.

No, Rengoku is not alive in the manga. He tragically died during a battle.

Yes, Rengoku did die in the manga.

Yes, Rengoku does die in the manga.

One idea could be a rengoku fanfic where he trains a new group of young slayers. It could focus on his unique teaching methods and how he instills his values in them.

Rengoku doesn't turn into a demon in the manga. His character arc stays true to his heroic nature and doesn't involve any demonic changes.

One of the main themes is adventure. Since rengoku is often involved in battles and dangerous situations, the fanfics may take the reader along on these adventures. They might face demons together and their relationship develops through these shared experiences. Also, loyalty is a big theme. Rengoku is a very loyal character, and this loyalty extends to his relationship with the reader in the fanfics.

I'm not sure about a specific 'bottom mark got7 fanfic'. But you can try searching on fanfiction websites like Archive of Our Own. They usually have a wide range of GOT7 fanfics, and you might find the ones related to 'bottom mark' there.

One possible plot twist could be that Tanjiro has to sacrifice a part of his own power to save Rengoku. Maybe he has to give up some of his newly acquired breathing techniques which he has worked so hard to master. This would show his selfless nature and his deep respect for Rengoku.