Masamune recieves a letter with the words "Pig's Foot" written on it and realizes someone knows about his past. Masamune tries to find the person who sent the letter, and it ends up being someone rather surprising.
When you exchange email addresses,
،عندما تتبادل العنوان الإلكتروني مع أحدهم
Cuando intercambias correos,
Cuando intercambias correos,
Quand on échange son numéro,
le nombre de contacts est dévoilé.
Quando scambi l'email con qualcuno, quella 
persona potrà vedere quanti contatti hai salvati.
Quando se troca 
números de telefone,
Когда даёшь кому-то номер,