Kidnap the professor and reach Sergei's A ending.

Steal the diamond and reach Sergei's A ending.

Play all of Hunter's routes.

Kidnap the professor and reach Hunter's A ending.

Purchase something from the Duke in the story.

Finish reading

Repair your relationship with your little sister

Preside over a tearful reunion

Watch your grandmother sample a cute dessert

Take a bus ride

Receive a gift from your little sister

Play all of Sergei's routes.

Kidnap the professor and reach Sergei's B ending.