Isikawa Sizuka姑夫婦と同居する娘婿は、姑のしずかの巨乳の虜になっていた。ある日、しずかのダイエットのトレーナーをすることになった娘婿。だが、その視線はしずかの巨乳に釘付け！眼前で揺れる巨乳、そのいやらしさに興奮した娘婿はしずかに襲いかかる！セックスレスだったしずかは、娘婿の激しいパワー系SEXに絶頂してしまい…。
*Her training appearance was very obscene. If you stretch your nipples and make them stand up, you'll get it wrong. I guess this will never happen.
The lewd lingerie scenes that were a staple in the early series are back! I was sad when they disappeared, so I'm happy they're included here. Including lingerie allows for scenarios like 'she bought this for her son-in-law' or 'she's wearing what her daughter-in-law gave her.' If I had to ask for more, in the first film, there was a fantasy scene where the son-in-law fondled the naked mother-in-law at the dinner table. It would be exciting if they showed a fantasy sequence where she's talking to her husband in normal clothes, and it softly transitions into her wearing the lingerie while talking. Also, the scene right next to the sleeping husband was top-tier! It's a shame there was no bath scene where they wash each other. I want lingerie and bath foam play in every installment!
