A Japanese lingerie brand Ravijour has released a new magical bra that only unhooks when the wearer is truly in love.

A Japanese lingerie brand has released a unique product to blend its core line of fashion with technological advances. The newly developed bra is fitted with an in-built heart rate monitor that pairs up with a mobile phone app to unhook the bra when the wearer hits the so-called "True Love Rate." The lingerie brand has developed the "True Love Tester" bra to celebrate its tenth year anniversary through its "Mood Up" themed campaign.

The makers of the unique under garment insist that the bra does not unhook itself when the wearer's heart beat rises due to jogging or exercising. The mobile app can differentiate between a heart rate increase caused by physical activity and an elevation caused by romantic excitement. The chip inside the bra monitors the spike in heart rate caused by hormone levels secreted by the 'adrenal medulla, ' media reports say. The bra does not unhook until the wearer's pulse rate hits the so-called "True Love Rate."

In a strange video, to mark the launch of the new bra, women are seen in different situations being pestered in a night club by various kinds of men. Later the video shows men trying to unhook the bra, but only to fail in all attempts.

According to a report from Japanese news site IT Media, the bra is not available for sale directly, but buyers can purchase Ravijour branded products worth 5,000 yen (about US$50) and win a chance to test it out at hotels of one's choice in six different cities across Japan. The company will pick up five lucky couple as the winners of the contest.

Ravijour is not the only company to work on a highly advanced tech bra, software giant Microsoft had also shown a prototype of a smart bra in December. Microsoft's invention was more focused toward preventing stress-related over-eating, unlike Ravijour's "True Love Tester."

 With the growing portfolio of wearable techs, it is interesting to see new companies battle for supremacy in this emerging market.