The Shounen-ai reference article from the English Wikipedia on 24-Apr-2004
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Shounen-ai

Shounen-ai (pronounced /So:nenai/) (少年愛) (from shounen, boy, and ai, love), refers to anime or manga that deals with love between teenage boys or young men, especially of the bishounen variety. Shounen-ai is usually thought of as less explicit or sexual than yaoi.

Shounen-ai is very popular in Japan, especially among schoolgirls and housewives, and is often to be found as part of shoujo anime or manga.

The term 'Shounen-ai' is no longer in use in Japan today. One may use 'Boy's Love' (BL) instead.

Warning: Plot details follow.

Some series that include shounen-ai elements of various degrees include:

See shoujo-ai.