Telling her she's beautiful and asking for her phone number once is not sexual harassment. Continuing to do so after she has made it clear she isn't interested is.
However, it does look like he's either looming over her or about to put his arm around her. That's definitely not ok.
If you think that combination of body language and proximity is acceptable when speaking to someone for the first time you're mistaken. It comes across as Intimidating. Respect people's personal space.
Actually it's missing a lot of panels. She is interested and they date for 3 years before getting married. But then things turn sour after 4 more years, 2 kids, and both of them falling out of love, and she made up stories so that her colleagues ended up arresting him to gain an advantage in the custody battle. You can tell this from the way he's holding his head in the last panel.