You might like 'Quietude's Adventure.' It's alike in that the main character desires a quiet life and the story has a similar tone and style. There are elements of adventure and self-discovery that echo those in 'The Hunter Wants to Live Quietly'.
One manga that could be similar is 'The Recluse's Path.' It has a similar focus on a character seeking a quiet and peaceful life while facing challenges.
It's about a hunter who decides to lead a peaceful and quiet life. But, of course, things don't always go as planned and there are various challenges along the way.
The 'Hunter Wants to Live Quietly' manga showcases the protagonist's longing for tranquility by having him constantly reject offers that might disrupt his quiet life. He also builds relationships with like-minded characters who share his desire for peace. This all helps to convey his strong wish for a calm and undisturbed existence.
One manga that could be similar is 'Monster'. It has a similar dark and intense atmosphere and complex plotlines like 'The Hunter'.
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.
It's hard to say exactly. But you might want to check out manga like 'Attack on Titan' as it shares some similarities in terms of intense storylines and complex characters.