Spoiler question for ... Only those who have read the Rae’s and last chapter .. ...

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I think it's the grave of the girl who got raped by Boris's "friends".
And he probably does have an ex but i don't remember seeing one in the raws

Thanks ! What’s chapter does he mention the rape ? Does it mention their relationship ?

Hmm sorry i'm not too sure, i think it shows the rape scene in upcoming chapters, i read it in the raws. I don't think he had a relationship with the girl who got raped, i remember seeing her run in front of his car to kill herself or something so that's probably as far as their relationship goes