Sometimes when you're in love you feel like you and your significant other are one. It's a wonderful feeling to have, and it's also the theme behind a series of ads for Japanese sex shop Condomania, which features couples vacuum-sealed together as one unit.

In this YouTube video showing how the ads were made, Japanese photographer "Photographer Hal" explains some of the inspiration behind the series of shots: "Human beings aren't completed if they're just by themselves. It's when they come together, when they come really close, that they're finally completed," he says. "That's why I pack them together."

The couples, who are arranged into an empty futon bag, take sips of oxygen from a can in between Hal's shots, and only stay packed in the bag for 10 seconds.

Photographer Hal has been shooting photos of couples sealed together for a few years now as part of a series titled "Flesh Love." The artist's online bio says he usually asks couples he meets out at bars to be part of his projects, putting them in "crucible like spaces only to convey his continuing theme of 'love of the couple.'" The result for the "Flesh Love" shots and the Condomania campaign is couples in such emotional and physical proximity that they appear to have literally fused together.

Check out the ads for Condomania below: