I suggested RAPE on the tags. Also reading the comments a "wtf am I reading" tag should be added!!
It's pretty clear what is going on, WTF am I reading is reserved for bizarre, confusing, or nonsensical stories, and it doesn't have enough physical coercion to justify the rape tag.
That's a total myth. Rape doesn't require physical force, it just needs to be sex without consent. False beliefs like this are one reason why it's so hard to prosecute rapes, and gives apologists one more justification to belittle victims. Educate yourself!
Not to mention, there's actually quite a bit of physical coercion here, with the little girl trying to get away and being restrained at various points.
And since children can't give concent, it is rape. Agreed.