a girl, asuka, is in the hospital. shinji is visiting and shakes her while crying 'wake up wake up' this shaking makes her vest unzip...

shinji, who is incredibly mentally ill, traumatised, and depressed responds to this by whipping his dick out and jerking off

fun fact: the maker of the manga said he was uncomfortable with drawing a scene where shinji and another guy, kaworu kissed, but never said anything about this scene