Is it me or his sister looks younger(?)

I'm pretty sure This is the past I think

nope she looks the same to me.

She looks younger to me too... And if this is the past... Then this explains why Jian yi says he hasn't met her before although we have like 3 chapter or so of proof... But I'm once again confused with the story line here if that's true... ┗( T﹏T )┛

this chapter just had a translation error so thats why you're confused. Jian yi and the sister already met (=・ω・=)