| title | ISBN-13 | year of publication |
|---|---|---|
| Love break off to join 04 | 978-1-55291-785-5 | 2013 |
| Work together to break off 01 situation | 978-1-55291-782-4 | 2013 |
| Work together to break off 02 situation | 978-1-55291-783-1 | 2013 |
| Work together to break off 03 situation | 978-1-55291-784-8 | 2013 |