Star formation history of massive galaxies (σ > 100 km s⁻¹) in TNG100. Colors and lines have the same meanings as Figure 3. The correlation between SMBH overmassiveness and the host star formation history is different in TNG100 than in Illustris and the observations in Martín-Navarro & Mezcua (2018). On average, the hosts of overmassive SMBHs in TNG100 have higher SFR than the hosts of undermassive SMBHs throughout history, but the two populations have similar nSFR and cumulative star formation history.