Uhmm it's about a girl who's almost 30 next yr.. and she can't clean or do anything home work herself... So appoints a housemaid but turns out to be a boy and in reward he asks for pleasure and notes it down for his sex toys research...
Later she falls in love and he doesn't and then when he tells him her love he also declares his love too and the fact he couldn't get hard instead of her
Uchi no kaseifu wa H de namaiki de Wakeari