The extra pages of Chainsaw Man Volume 8 show a young Kishibe trying to ask out Quanxi for a date and gets hit every time he asks that.
But after asking relentlessly to date Quanxi for 9 years and even confessing his feelings for her, Kishibe gets rejected as Quanxi says she might be into girls. To which Kishibe says that he knew all along. The extra also tells us that both Kishibe and Quanxi used to be partners.
This tag only applies if the pic shows the younger version of Kishibe who has Black Hair and usually doesn't have a scar.
