Refers to the circular halo depicted behind sacred figures in Buddhist and other religious art.
A halo is depicted behind the Buddha statue.
compensated dating; paid dating (with a minor)
Internet slang derived from the homophone 援交 (enjo kōsai). Often implies dating an underage girl and may involve sex. Strongly associated with online forums and youth slang.
See also: 援交
On the internet, 円光 is sometimes used to mean compensated dating.