Keiki's investigation reveals that the senpai he looks up to is a huge pervert, but it doesn't stop him from pushing forward. There are other suspects to interrogate! He approaches his kohai Yuika, a cute and supportive student librarian.
I see, with Yuika-chan.
Ach so. Mit Yuika.
Ya veo, con Yuika.
Entendi, com a Yuika-chan.