Light curves of KIC 5255552. Upper: the whole light curves. The red points are the extraneous eclipses that can been seen more clearly in Fig. 2, and the gray arrows are used to illustrate the time intervals between the extraneous eclipses. Lower eight panels: the four selected light curve parts in phase form, showing the eclipses at phase zero (left) and phase around 0.43 (right) with their fittings (black line).