The Only Thing.. Why natsu always enter Lucy home?.. The real answer is.... NATSU save Lucy life several times if Lucy was Trouble... Lucy didn't realize how natsu save her so many times.... She never even thanks to him.. That why natsu always enter her home without her permission 🤣😅
Asuna always invites Kirito to her house. Tomoyo invites Sakura to her house occasionally. But Natsu and Happy just break into Lucy’s house (other people as well)