Amane's mother, Shihoko, arrives at the apartment without warning while Mahiru is visiting. Amane asks Mahiru to hide, but Shihoko eventually finds her, and the two neighbors frantically try to correct Shihoko's assumption that they are dating. Nonetheless, Mahiru is touched by Shihoko's motherly kindness. After Amane sees how happy Mahiru is to be called by her first name, he tries calling her "Mahiru" too. From that day on, the neighbors call each other by their first names.
Don't try to turn all opposite-sex 
friendships into something romantic.
لا تحوّلي صداقة بين جنسَين إلى شيء رومانسيّ
No conviertas la amistad
entre chicos y chicas en romance.
No conviertas la amistad
entre chicos y chicas en romance.
Non tutti i rapporti uomo-donna
 devono per forza essere romantici.
Não tente transformar todas as amizades
do sexo oposto em algo amoroso.