Long love & happiness endeavored to develop sex industry. We aimed at both sexes to develop a set of weightless sex assistant device, wings of Angel, which takes out a national patent and invention. Except avoiding be tired of ache, numbness, and pain, this device especially helps people with disability, old person, the weak, and fat person to enjoy sexual behavior, get more closer to each other, and enrich sexual life. The invention of wings of Angel, weightless sex assistant device, may be regarded as the historic originality of human being in 21th century.