https://www.mangago.me/read-manga/mihanada_pectolite/uu/766ee0ca9988d6982c7df650c33d2271_chapter-3/pg-1/Thank you!
i think it's this Mihanada Pectolite
Could be either: Umibe no EtrangerHarukaze no Etranger
https://www.mangago.me/read-manga/mihanada_pectolite/uu/766ee0ca9988d6982c7df650c33d2271_chapter-3/pg-1/
Thank you!