Coffee Time Confrontation! is the twenty-fifth chapter of the Oushitsu Kyoushi Heine manga.
Licht, Leonhard and Heine are in the palace gardens having a snack break after lessons. Licht is outraged to discover that Leonhard hates coffee, and is determined to make him appreciate it. His many attempts fail, until he manages to make the coffee taste less bitter by using the same ingredients used to make a cake, and succeeds.