Kotoko and Kuro discover where Rikka, his cousin with the same powers, has been living since their last encounter. They go to investigate the apartment, which has a grisly history.
and couldn't actually 
care less that his ex died.
.ولم يكترث قطّ لموت حبيبته السابقة
Der interessierte sich nicht
die Bohne für seine Ex-Freundin.
al que no le importaba
la muerte de su ex.
al que no le importaba
la muerte de su ex.
et se ficher de la mort de son ex.
a cui non importava nulla 
della morte dell'ex fidanzata
Não devia dar a mínima pela ex.
Смерть бывшей его при этом не заботила,