Tengoku to Jigoku Saikyona Futari (2021) ตอนที่ 1-10 จบ ซับไทย: 1x6

Episode 6

Suspecting an old love letter in Haruto’s possession holds a clue to solving the case, Ayako investigates his past to find out who sent it. Meanwhile, Hideo is approached by a man arrested for gambling who wants to make a plea bargain in exchange for information. According to him, the timings of the murders all share something in common.