自分の中で真尋君としおりさんって同級生疑惑あるんですよね(もしくは先輩後輩)。
歳的にも住んでる場所的にも十分あり得ると思うんですよ。
というわけで真尋君の過去ネタ(妄想)。
思い出のあの子の今？ああ、知らない方がいいですよハイ。

I have a suspicion that Mahiro-kun and Shiori-san were classmates (or maybe senpai and kouhai).
Given their ages and where they live, I think it's quite possible.
So, here's an imaginary story about Mahiro-kun's past.
What is that girl from my memories doing now? Ah, it's probably best not to know.