In order to find the truth about what happened, Tooru leads his father away from the group as they sneak into the lab.  But his father finds out what he's doing and sets an ambush for them.
Promise me you'll be strong.
Versprich mir, dass du stark bleibst.
Prométeme que serás fuerte.
Prométeme que serás fuerte.
Promets-moi de rester forte
Devi essere forte.
Me prometa que será forte.
Пообещай,
 что будешь сильной.