For those who don't know much about "Durarara!!", I wrote the link of Wikipedia about the novel.
Durarara!!

Related contents:

1. Ferarara!!

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2. [For beginners] How to do blowjob

3. [For beginners] How to make money with adult contents — Basic course

4. The video version of this episode: [Note 148] Durarara? No, Ferarara.