Ognyanov started 2015 with a fabulous goal and an assist for the 3–0 home win over PFC Marek Dupnitsa. On 10 March Mariyan was again among the best players on the pitch in the next round of A Grupa. Ognyanov prove his creativity and passing abilities and was involved in both goals for the 0–2 away win in the derby match against the local rivals Lokomotiv Plovdiv. Ognyanov missed the game with CSKA Sofia due to a ban, and on 22 March he was again in the starting lineup for 0–0 draw with Ludogorets Razgrad. On 18 April, Ognyanov scored a goal for the 1–1 draw with Beroe Stara Zagora.