Gu Jei didn't realise how strange his thoughts were.
That's understandable because he has been inflicted with an ailment common among Espers without even realising it.
This condition, which only affects Espers, is commonly abbreviated as Naegajak ¹, or more accurately, My Guide is too small. Complications include My Guide is too fragile, My guide is too kind, and My guide is too cute.
They're a work of art is another ailment which most Espers who met Guides with high matching rates suffered from.
A common symptom of this disorder is that the Guide is viewed differently from others, as if a filter is applied.
Even if the Guide is over 190 cm tall, they would seem like a small chick, and even if they are a muscular boxer, they would appear frail to the afflicted Esper.
However, the Esper is completely unaware that they are looking at the Guide differently from others, and researchers explained that this symptom is due to hormones released from the brain which impair cognitive ability.
Some have even said it's similar to how the brain works when you're in love.
(Chapter 74, Liar Paradox)
¹ my guide is too small (eng) >> 내 가이드는 너무 작다 (kr) >> nae gaideuneun neomu jakda (romanized hangul); thus naegajak
imagine a turning au where esper yuder gets 'afflicted' with naegajak syndrome towards his 198cm, way more muscular than him, guide 😂