I'd recommend 'Urban Immortal Doctor'. It shares similarities in the urban backdrop and the protagonist's journey of developing and using their unique skills. The themes of power, progress, and facing challenges are common to both this and 'Rebirth of the Urban Cultivator'.
Well, 'Urban Super Doctor' could be similar. Both have elements of urban life and characters with extraordinary powers. The storylines also have a mix of action and drama.
I'm not sure I know of any manga that are exactly like 'Suicide Boy' in those aspects. But you might want to check out some darker-themed manga like 'Death Note' or 'Tokyo Ghoul'.
Yes, there are a few. 'The Gamer' has some similarities in terms of unexpected plot twists and heroic challenges.
The manga 'Rebirth of Urban Immortal Cultivator' is different in many ways. It offers a fresh take on the genre with its innovative plotlines and complex character relationships. While it shares some basic genre characteristics, its unique elements make it a standout among similar manga.
Another option could be 'Gundam'. Both have elements of space travel and deal with complex character relationships and conflicts in that context.
One manga that could be similar is 'Watchmen'. It shares elements of dark themes and complex characters like Batman.
One manga that might be similar is 'Parasyte'. It has elements of horror and action, like Gantz, and explores themes of survival and humanity's response to strange threats.
I think 'Fruits Basket' could be similar. It has a similar emotional depth and character-driven storylines like 'Swan'.
I think 'Love Hina' might be somewhat similar. It has elements of romance and character development like in Sextudy.
I think 'School Days' could be somewhat similar. It has similar elements of complex relationships and emotional turmoil.
Well, 'Parasyte' could be a manga similar to Kaijii. Both have elements of horror and mystery, and the character development is quite engaging in both.