OMFG, this is the cutest erasable fountain pen

[cashew]

OMFG, why is this...waaaaah! I must figure out how to get this.

Edit to add:
Ah, it's DS-998 from 点石文具 (DianShi Stationary). Time to add this to the list of erasable fountain pens. 😝

You can buy the pen at TaoBao.