I think in this song the pronoun "I" is a girl which called as person who has not many experiences about something as love, we can see from the lyric "smallest as me", then from the lyric "greatness as you" means that pronoun "you" as a boy who has some experiences. Then the boy shows the girl about something deep as love, from the lyric "you show me what is deep as sea" sea here means as love. Some lyrics here using connotative meaning and we must know the meaning of this song deeply if we can understand more about itself to be denotative meaning as the lyrics "a little love, little kiss, little hug, little gift" we cannot imagine that the meaning of "little love, little kiss, etc" as what? Thus, we have to understand more about the meaning, in my opinion, "little love" means a simple action that the boy does for the girl as attention. The whole meaning that I can explain is the about the boy who shows and gives some experience about something deep as love to the girl through give love, hug, kiss, and gift which is unforgettable moments.