noun
Refers to the circular halo depicted behind sacred figures in Buddhist and other religious art.
仏像の後ろに円光が描かれている。
A halo is depicted behind the Buddha statue.
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
ネットで「円光」と書いて援交の意味で使うことがある。
On the internet, 円光 is sometimes used to mean compensated dating.