OT J075418.7+381225 and OT J230425.8+062546: Promising candidates for the period bouncer

This work was supported by a Grant-in-Aid “Initiative for High- Dimensional Data-Driven Science through Deepening of Sparse Modeling” from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan.We are grateful to many amateur observers for providing a lot of data used in this research.