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.
u would mostly get touched if u were an Amuto fan like me. But even if u ship Tadamu of other Amu/Ikuto related couples, u could still get touched door Seven Seas Treasure's meaning.