In order to help Professor Kouzuki fulfil her plans for Alternative IV, Takeru partakes in an experiment designed to send him back to his home world.
You really oughta lock the door 
when you use the bathroom, okay?
عليك إقفال الباب عند استخدام الحمام، مفهوم؟
Wenn du aufs Klo gehst,
musst du schon richtig abschließen.
Sabes que deberías cerrar con llave
al usar el baño, ¿no?
Sabes que deberías echar el pestillo
al usar el baño, ¿no?
Tu dois mieux fermer la porte,
quand tu vas aux toilettes.
Dovresti davvero chiudere a chiave
 la porta quando usi il bagno, sai?
Precisa trancar a porta
quando vai ao banheiro, tá?
Если идёшь в туалет, 
запирай дверь на замок.