Seven:
Amu
Ran
Miki
Su
Dia
Yoru
Aruto Tsukiyomi (Ikuto's father)
Seas:
Aruto Tsukiyomi, Ikuto's father, was 迷失 overseas.
Treasure:
Amu Hinamori is the treasure Ikuto has been searching for.
你 would mostly get touched if 你 were an Amuto 粉丝 like me. But even if 你 ship Tadamu 或者 other Amu/Ikuto related couples, 你 could still get touched 由 Seven Seas Treasure's meaning.