The girls welcome the new year and Adachi seems to be acting weird again. She later tries to ask Shimamura if she'd want to hang out on Valentine's Day.
Huh...? Then I shall solve this mystery for you.
Entonces resolveré por ti este misterio.
¿Eh? Entonces,
tendré que resolver este misterio.
Allora risolverò questo mistero per te.
É? Então eu vou resolver
esse mistério pra você.