When Koyuki, a new student, instantly falls in love with Natsumi, the secret of the Hinata family might be in jeopardy! The new student is actually a special agent who must report back to the Fifth One. Koyuki moves in next door with the hopes of getting a glimpse of the real family dirt!
- Encounter LIV: The World's Smallest Invasion: Continued
- Encounter LV: Enter the Dragonlike Transfer Student!
- Encounter LVI: The Fifth One Appears! The Legend of Dororo
- Encounter LVII: Emergency Warning! Koyuki Azumaya Approaching!!
- Encounter LVIII: Invasion In Bloom!! Operation: Cosmic Flower Expo!
- Encounter LIX: Special Effects: Job Hunting Made Simple!!
- Encounter LX: A Spreading Contagion?! Runaway May Disease!
- Encounter LXI: Swallow This! An Annual Invasion
- Big Bonus 1
- Encounter 54.5: The World's Smallest Invasion: The Lost Episode