Tensei shitara Botsuraku Kizoku Datta node, "Jugon" wo Kiwamete Kazoku wo Sukuimasu

A corporate wage slave loses his life while playing a game and reincarnates as Lid Springfield, a boy harboring immense magical power. He was looking forward to a leisurely and comfortable life as a noble with a warm and kind family, but... The Springfield family was a fallen noble house whose standing was in jeopardy because they hadn't produced a child with magic in 100 years...! Unlike in his previous life, he wants to be a pillar of strength for the family raising him with so much love! At that moment, Rid's unique magic, "Cursed Speech," awakens! To revive the Springfield house, Rid's plan is set in motion!

(Source: Funguild, translated)