The story is about Yuuki Rito, a high-school boy who cannot confess to the girl of his dreams, Sairenji Haruna. One day when coming home and sulking in the bath-tub a mysterious, nude girl, appears out of nowhere. Her name is Lala and she comes from the planet Deviluke, where she is the heir to the throne. Her father wants her to return to her home planet so she can marry one of the husband candidates, but she decides that she wants to marry Rito in order to stay on Earth.

Alternative title:

To Love Ru:

• 1. The Girl Who Swooped Down
• 2. Engagement Cancellation!?
• 3. Love Triangle
• 4. The Universe's Love Apron
• 5. The Queen's Written Challenge
• 6. The Alien Assassin
• 7. It Should Be Like This With a Man!
• 8. The Upright and Cleanhanded Prefect
• 9. With More Love Than the Stars
• 10. The Universe's Actress......
• 11. Golden Darkness
• 12. Tremble with Fear! The Sports Festival
• 13. The Greatest Man in the Universe
• 14. The Secret Which Belongs to Them
• 15. Princess of the Jungle
• 16. Run's Confession Attack Time
• 17. The Ghost of the Old School Building
• 18. Saruyama the Souvenir
• 19. Hell's Hot Springs Female Space Aliens Fall Into Seven Colors
• 20. Explosive Heat Girl Magical Kyoko Flame
• 21. Record of Yuuki Pavilion's Bloody Wind
• 22. Tremble with Fear! The Culture Festival
• 23. Saruyama's Shogun Harem Story
• 24. While I'm Shy
• 25. The Earth's Final Night
• 26. Lala