We have analyzed ALMA Band 6 data, including 1.3mm continuum, 12CO(2-1), C18O(2-1), and H2CO (301-202), of Class I protostar BHB07-10 and discovered a mysterious CO ripple structure in the envelope. BHB07-10 is located at the center of the Barnard 59 dense clump at the distance of 180 pc (Gaia DR2 Zucker et al. 2020). Our analysis shows that BHB07-10 has a small dusty disk with a radius of about 30 au, that is associated with active molecular outflows in the vertical direction of the disk. Of particular interest in this object is the CO ripple structure in the envelope, which is 10 arcseconds (a projection distance ~ 1900 au) away from the central star. This structure is on the equatorial plane and is a spatially independent structure from the molecular outflows. The maximum radius of the ripples is 360 au near the systemic velocity, and it shrinks at higher redshifted channel and disappears at |v_sys - v| > 4km/s. We have found that this observed structure is well explained as an expanding shell model with the expansion velocity of about 4 km/s. However, the estimated kinetic energy of the shell is 10^40 erg which is several orders of magnitude larger than the expected energy in a protostellar envelope such as internal turbulence, accretion flows, stellar flare events etc. In this poster, we discuss possible scenarios of the origin of this mysterious structure.