A package arrive without return address and it turns out a girl arrive in a box and she saw the energy drink and drank it. As he read the intruction came with the box, the girl must not drink energy drink or else she becomes grown adult and becomes horny. Only cure is his semen. Next is she got submerged in a bath tub and again, the mc did not read the whole instruction and she become twins and they had ffm threesome.
I tried searching it on google/nhentai and had no luck.
Anyone knows the name? Thanks!
Edit:
Source: Succuform by Ashiomi Masato