The character of Lupin III is a playboy, but this is also a show for kids. Some very low level banter and situations are all that take place.
A female character shows some cleavage and another wears a mini skirt.
Lupin comically slams his hands against a wall on either side of Laetitia's head and insinuates that if she doesn't give him her valuable secrets, he "Has other ways of getting that information" He puckers his lips afterwards, but she rejects his advances.
Fujiko Mine strips out of a low-cut dress in front of Lupin. Only her half opaque stocking covered legs can be seen as the dress falls around her ankles.