By Sedara Oluwadara Romelu Lukaku has returned to Inter Milan on a season-long loan, just a year after leaving for Chelsea.   Chelsea paid Inter a club-record £97.5m for Lukaku, 29, last summer but, before Christmas, he said he was "not happy" and hoped to rejoin the Italian side.   Inter have agreed to pay a loan fee of about 8m euros (£6.9m) for Lukaku, who helped them win Serie A in 2020-21.   The Belgium striker was not a regular starter for Chelsea last season but scored 15 goals in all competitions.   It is understood Lukaku was willing