Lucifer of the Optional Attendance
DxD LN 21 cover
Cover of High School DxD Volume 21 featuring Vali Lucifer
Kana ハイスクールD×D 21 : 自由登校のルシファー
Romaji Haisukūru Dī Dī 21 : Jiyū Tōkō no Rushifā
Air/Release Date March 19, 2016[1]
ISBN 978-4-04-070666-5
Previous Belial of Career Consultation
Next Gremory of the Graduation Ceremony

Lucifer of the Optional Attendance is the twenty first novel of the High School DxD series. It is the ninth and final novel of the Legend of Oppai Dragon and his Lively Companions arc.


  • Encounter. White Dragon and Black Angel
    • Khaos Disaster
  • Life.1 Amidst the Feast of the Imperial Beast/Trihexa
  • Life. Ba’al Lion of the Great King —Great King—
  • Life.2 Team [DxD] Attacks!
    • Determination
  • Life. Lucifer Dawn of the Morning Star/Lucifer — Death Match —
  • Last. DxD Crimson (深紅) and Crimson (真紅) — United Front —
  • Eternal Life. Amidst the White Snow
    • Farewell Temporary
    • Y Ddraig Goch & Albion Gwiber
    • Report
    • The remaining hopes
  • Afterword



Main Characters Returning Characters New Characters Antagonists




  • Vali is the third male character to appear on the light novel cover after Issei on Vol 1 and Gasper on Vol 16.



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