Namida Ame to Serenade - Vol. 7 Ch. 38

[MangaDex]

 

[imhikarucat]

Tell me all plot holes I might have but my guess for this necklace is her great grandma is actually Hina herself passing this necklace from generation to generation until it met the future unborn Hina again and the story repeat. Maybe so all the Hina from the future can be forever with Takaaki? For how the past Hina can obtain that time machine necklace, that's still a mystery?

Spoiler: Mirai Nikki spoiler warning

Feels just like it but somewhat better I think

 

[crimony]

he better give that necklace back to her. i really don't like taketora ahh