chap,1,teleported

this is haru and sen haru is the oldest and he's over protective and he had a girlfriend and he's age is 17 and sen is the youngest and she's the happiness girl and she has a crush on gratsu and she's 8 and they been teleported to the spirit world and they meet there parents and aunt and grandfather and they work there to and the end they soon find out there secret

Question:
1.what well happen to them?
2.are they in danger?
3.who sends them to the spirit world?