Answer:
In Haikyuu the main characters are mostly Shoyo Hinata and Tobio Kageyama. KageHina is the slash ship between Kageyama Tobio and Hinata Shōyō.
A competing device is the Camera Lucida . "Camera Obscura" means "dark room", and the use of a pinhole in a window blind to form an inverted image of an outside scene on an opposite wall of a dark room.
Can you be more precise on your question. Sorry I couldn't help
