Heavy Object Volume 04
Theoretical Vein
Heavy Object v04
Title in Japanese ヘヴィーオブジェクト 電子数学の財宝
Rōmaji Translation Hevī Obujekuto: Denshi Sāgaku no Zaihō
Date of Release September 10, 2011 [1]
ISBN Numbers ISBN 978-4-04-870549-3
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Heavy Object: Theoretical Vein (ヘヴィーオブジェクト 電子数学の財宝, Hevī Obujekuto: Denshi Sāgaku no Zaihō, lit. "Treasure of Electron Mathematics") is the fourth volume of the Heavy Object light novel series, released on September 10, 2011.

Publisher's SummaryEdit

Miniskirt Santa! Tsunpri Princess and big breasted Froleytia are miniskirt Santas ......! What is heck, what kind of foreshadowing is this for Quenser and Heivia!? Futuristic action!

Chapter ListEdit

  • Prologue
  • Chapter 1 - What Should Have Been a Pure Blue Ocean >> Unofficial Battle in the Loyauté District
  • Chapter 2 - Christmas on a White Sand Beach >> Furlough Garrison Battle (?) in the Oceania District
  • Chapter 3 - The Treasure of the Sea Dyed Deep Red >> Defensive Battle in the Solomon District
  • Epilogue


  • The novel's subtitle refers to the method of artificial platinum production which Roybelz Oldnick supposedly has knowledge of.[2]


Pg. Description Notes
N/A Froleytia Capistrano Front Cover Illustration
N/A Color Illustration 1
N/A Contents/Index with Object information
N/A Color Illustration 2, Character Profile
N/A Color Illustration 3, Spread
009 Black Opening Cover Start Cover
N/A Rear Cover


  1. Heavy Object: Theoretical Vein, Dengeki Bunko (Japanese)
  2. Heavy Object: Theoretical Vein Chapter 3