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