In the movie Aoki Hagane no Arpeggio: Ars Nova Cadenza, at 38:30 mark, Iona got attracted to a pendant in shop.
... which lead to another event where Iona met Musashi.
I, myself, feel that these events are so connected. Going to town, the pendant, Musashi. However, I have no clue why.
Could anyone provide me with solid argument and evidence?