Many of the quintuplets are against having an unknown male in their apartment .
Fuutarou 's diligent tenacity gradually convinces those girls to reduce Many 's attempts of having him poisoned or arrested , and to advance Many 's their studies .
Many of the quintuplets are against having an unknown male in their apartment , but Fuutarou 's diligent tenacity gradually convinces those girls to reduce their attempts of having him poisoned or arrested , and to advance in their studies .